MaxAmps.com Green Series Life 4500 6.6V Battery Pack - New cell technology! [Archive]

BrandonWilcox

06-08-2009, 08:56 AM

The latest from MaxAmps.com (http://www.maxamps.com/):

87813

MaxAmps.com brings you the exclusive “Green Series” LiFePo4 battery packs. These new “life” packs will not catch fire or explode with overcharge. In addition to being safer than LiPos, they are more robust. The new 4500mah 6.6V pack can be charged using our Hyperion line of chargers under the LiFePo4/A123 setting.

• Perfect fit in all standard rc car battery trays
• Same flat format as lipos(136mm x 45mm X 26mm)
• Low-maintenance and user-friendly
• Inherently safe technology
• Low voltage cutoff is not required
• 1000+ usable cycles
• 5 year 1000 cycle warranty available
• Environmentally friendly
• Water-sealed for all-weather protection
• Up to 60C discharge rating(1700+ surge watts)
• Up to 15C charge rate(67 amps)

Jason MaxAmps

06-08-2009, 10:36 AM

I ran this pack all last week in final testing in my Traxxas Slash powered with a CC Mamba Max and a 5700 motor. The gearing pulls about 67 amps peak and was giving me 15 minutes of non-stop run time on the test track. The pack was charged at 10 amps on my Hyperion DUO and took 30 minutes to put in 4500 mAh. Pack temp after charge was 84 degrees. Pack temp out of the Slash after 15 minutes of non-stop running was never more than 90 degrees. I had the LVC set for 2.0 volts per cell, Slash stops rolling at 4.8 volts so LVC's are not needed. Power is that of a 6 cell Nimh pack and real close to a 2S Li-Po. This is a great beginners pack. Good power, good run times, short charge time, and best of all really safe.

Jason

Jason MaxAmps

06-08-2009, 01:57 PM

The 2S2P 4500 pack retails for $119.99

Pack weight 75 grams per cell and figure 15 grams for plugs and wire. Pack total weight at @ 315 grams

A 2S 2250 pack will also be available for around $60.00

For more info or to order please call 1-888-654-4450

They will be on the site in the next couple of days, a link will be posted then.

Jason

belila

06-08-2009, 03:20 PM

Hardcase an option?

Jason MaxAmps

06-08-2009, 03:51 PM

Hard case will be an option for the 2S2P 4500 packs. The option will be on the site when the rest of the info is posted.

Jason

Jason MaxAmps

06-08-2009, 04:30 PM

porra

06-08-2009, 04:41 PM

I have been testing these cells for the past few months on my CBA II unit and have also been running a 2S version in a CC 5700 powered Slash for about 2 months as well. I was able to get the 4 cells from our first batch 2 weeks ago to run as a 2S2P 4500 in the Slash and it's been a hoot to drive. Great run times, great power, and best of all short charge times. The numbers are very true. As for graphs on the cells we won't be letting them out for some time. These are new cells and we'll just say that the info is a company secret. If you feel you can't trust what we state then I'm sorry maybe these are the cells for you. If you know of other places that make similar cells then it appears you have what you want.

Best regards,

Jason

All sounds good coming from you, but I would like to see some real long term data, specially to justify the 1000 cycles after you put the cells through the C rating claimed. There's a guy in another forum who tests cells (packs) and he has done a wonderful job of testing many different brands, but he doesn't kiss a#$ and posts real info. What I would like to see is some real world claims. I would hate to see a devoted MA kid get hurt trying to get all the power you guys claim. Education will keep this hobby safe and it should start from the brands that offer such products.

Jason MaxAmps

06-08-2009, 07:19 PM

These are very safe packs designed for the new guy that doesn't want to take the Li-Po plunge yet. It's clear from your tone and what you have typed that you have another agenda here so I'll leave it at that. You take care.

Best regards,

Jason

samsquatch

06-08-2009, 07:22 PM

Will their be packs with higher capacity then 4500 in the near future?

rccardude04

06-08-2009, 11:13 PM

C-Ratings are sort of getting out of hand like HP ratings on nitro engines. It's going to happen and nobody can stop it. The companies who don't will lose sales.

Anyone who's in the hobby and plays with electrics will know that MA hasn't had 100% perfect qc or testing parameters. I'd like to think they're getting better about it, but time will tell.

These cells do look promising though. Look like soft-case A123 cells to me. They're even about the same capacity it seems.

-Eric

austinelse

06-08-2009, 11:20 PM

Hi Guys,

Austin here with MaxAmps.com

porra- I absolutely understand your concerns regarding over-rating packs. In fact we have begun switching our packs over to a new "surge watt" rating system that is similar to the speed control manufacturers. We also include the exact method that we use to confirm the ratings that we place on our packs on the lipo info section of the website. We have used the same method for rating this new life technology.

Best Regards,

Austin Else
CEO MaxAmps.com

Freezebyte

06-08-2009, 11:24 PM

I have run RC vehicles since 1987. 1995 was my last "hobby" quality RC electric vehicle until 2007 when I tried a nitro Traxxas Revo 3.3 and recently i'm now a proud owner of a new HPI Savage Flux. Sorry, but there's nothing you can do to change my perspective of your company and products. Hell, I won't even take a chance of putting in your Lipo's even if you gave me FREE ones for fear of them ruining my Savage Flux.

Sorry MaxAmps, I know every company/product isn't perfect, but your tarnished track record will prevent me from ever recommending or trying your products.

austinelse

06-08-2009, 11:40 PM

Freezebyte-

Since you are concerned regarding the safety issues of lipos, these new life cells are actually the perfect pack for you, go figure:).

I am sorry that you are so passionately against a brand of product that you have never used. Frankly, our track record speaks for itself. We can certainly agree to disagree and you can choose to spend your hard earned money in any way that you would like. If you have any more specific concerns regarding our company, feel free to call me personally on the toll free number at 888-654-4450.

Best Regards,

Austin Else
CEO MaxAmps.com

porra

06-09-2009, 12:06 AM

Rckcrwlr

06-09-2009, 06:19 AM

Jason & Austin,
Thanks for the input on this new technology. Look forward to trying them out on my ZX5...looks like the perfect mix of power in a small package...

John

jocktheglide165

06-09-2009, 06:58 AM

thats nice I wish you the best of luck.....

All my lipos are fine and I do my best to try and educate people to not fall for over rated products. I did it to SMC and Thunder Power as well so this is not just a MA thing. I don't know where you live, but I have never seen anyone where I live make a pipe bomb so you're on your own on that one. Many kids do dumb things because they go by what the brand states. It can be seen in basically all the R/C forums. One example can be seen in rctech in the On-Road section, thread called Best ESC. Someone mentions that the Ko Propo has the highest cont. AMP rating which is like a few others just over rated to a level that is just pathetic. Educating means if a cell is capable of 60C discharge why not rate it for 30C or less to be on a safe side (For the brand) and to offer a more realistic rate that could offer the best life cycle from the cell. It's a very simple concept of being safe then sorry.

Now as for assuming I have no kids, you can assume that, but many people who knows me personally and/or over the internet will tell you otherwise and I can definitely tell you that safety is first. When you do find out if I do or don't have a kid, you'll be very surprised.

Jason MaxAmps

06-09-2009, 08:16 AM

Will their be packs with higher capacity then 4500 in the near future?

That's something we are working on. The issue is getting the higher capacity into a usable cell size that will still fit into a standard RC car battery tray. The 4500 capacity of these is pretty good though if you think about it. I get 15 minutes of non stop running in my Traxxas Slash on a CC 5700. Now the cool part about it is that the average bashing around will get you longer say like 20 to 25 minutes. Not bad at all. What makes up for the runtime is the charge time. My Original Hyperion DUO tops out a 10 amps. That breaks down to a 30 minute balance charge. If you charge at a higher rate you can knock that back even shorter. That puts you back behind the wheel quicker ever time without performance loss or the worries of trying to fast charge say like a NimH Pack or a Li-Po.

Jason

Mark R

06-09-2009, 08:35 AM

guver

06-09-2009, 08:40 AM

If the battery is depleted (like Jason's must've been to require 100% capacity) What percentage of capacity is added at a 15C charge rate at the point of cv stage?

please assume everything upstream is adequately sized.

I guess a simpler way to ask might be : when is the cv stage hit during a 15C charge? (in capacity)

Adam Bailey

06-09-2009, 08:51 AM

Jason, Austin

The packs look real good, you plan on submitting them or more to Roar for race approval?

Jason MaxAmps

06-09-2009, 09:40 AM

Guys, this topic seems to be straying. If you have your own personal vendetta against a company, claims, or require data for 1000 cycles, please keep it to yourself.

LiFe is fantastic technology, I personally have seen it used in large scale aircraft and it works great. Quick charge times, great discharge values. Heck, it's even great for the experience lipo user for the quick charge times alone. I believe you can run them until empty as well (correct me if I am wrong)

Mark,
you are correct about running them down to nothing. In most cases though you won't get that far. Most motors just simply stop running at a certain voltage. Take my Slash, I set the LVC for 2.0 volts per cell. Well I never got that far down, the Slash stopped rolling at about 4.8 volts every time. That a cool thing about the packs there is no need for an LVC. Running the car or truck until it stops won't hurt the packs.

Guver,
I'll let Austin field that question I don't have a charger at home that will do 67.5 amps with logging capabilities.

Adam,
At this point we won't be sending it in to ROAR, this pack is meant to be for the new guy that wants something better than NimH but without the some of the worries that are associated with Li-Po's.

guver

06-09-2009, 09:58 AM

Thanks, Jason. I don't have one that does 67 amps either (not yet)

Even just a guess would be helpful , we'll wait for Austin.

An actual or estimated "constant" or "sustained" discharge spec and or graph would also be nice.

Cain

06-09-2009, 11:00 AM

Adam Bailey

06-09-2009, 11:20 AM

Adam,
At this point we won't be sending it in to ROAR, this pack is meant to be for the new guy that wants something better than NimH but without the some of the worries that are associated with Li-Po's.

Got it;)

Jason MaxAmps

06-09-2009, 11:27 AM

Jason,

have you tried these packs in your 1/8 scale vehicles? Even though they are alittle more porky than a higher mah lipo pack, the safety of the cells could be a good selling point for those wanting 1/8 but afraid of lipo. And the slight extra weight probably won't matter much in the F8T.

I would like to here your reports on testing these, or, maybe if cookie gets a 1/8 scale electric and is still with you guys, see them first hand. :D

Cain,

That's actually next on the list. I have the shop making me 2 new packs to run in the Fusion. Size wise they are pretty much the same as a 6500 7.4 pack but with the 1/8 scale power and capacity requirements they will be a bit slower and run times I'm guessing will be closer to around 8 minutes max or so. I'm hoping to have the packs by the end of the week or the first part of next week. I would guess that the lower voltage would make an 1/8th scale car perform very well on say a track laid out for 1/10th scale.

Jason

BrandonWilcox

06-09-2009, 11:32 AM

Just got these packs in today, I'll be testing them and posting up my results soon, keep on eye on rccaraction.com for the review!

87851

87852

Caster Racing

06-09-2009, 12:11 PM

Brandon,

Let me know what your results are as a neutral party. I personally run maxamps packs as do a lot of our team guys and of course, I am looking at the rtr market and safety is my biggest concern as I have posted everywhere in the past. I can think of 2 vehicles you can use for testing....lol.

Jason MaxAmps

06-09-2009, 12:13 PM

It shouldn't take you long to charge em' up. Get going man!! LOL

Jason

belila

06-09-2009, 01:25 PM

Jason, can custom LiFe packs be made to order if one so wish? I'm talking about dimensions and S number (6S in my case).

Jason MaxAmps

06-09-2009, 01:47 PM

Cell size cannot be changed. We can build 2S2p packs, 3S2P, 4S2P and so on. Custom orders must be called into the shop at 1-888-654-4450.

Jason

Cain

06-09-2009, 02:33 PM

Jason,

using the script asylum speed calculator, for 14.8V with gearing to approx 41mph, using a 13.2V pack, I would go with 1 - 2 pinion teeth larger for similar speeds, vehicle dependent.

These packs probably could work well in giving you some more gearing room. My Hyper 9E on the 2200Kv castle motor could use more, or the Tekin motors that are fatter around than the speed passion motor size (36mm).

BrandonWilcox

06-09-2009, 02:48 PM

It shouldn't take you long to charge em' up. Get going man!! LOL

Jason

They are already charged...unfortunately its pouring raining here.

Brandon,

Let me know what your results are as a neutral party. I personally run maxamps packs as do a lot of our team guys and of course, I am looking at the rtr market and safety is my biggest concern as I have posted everywhere in the past. I can think of 2 vehicles you can use for testing....lol.

I can think of 3 :)

guver

06-09-2009, 03:14 PM

Can we get 1P config (2250 mah) in 2-6S? thanks.

Jason MaxAmps

06-09-2009, 03:30 PM

Can we get 1P config (2250 mah) in 2-6S? thanks.

Yes we will be doing those as well.

Jason

Jason MaxAmps

06-09-2009, 03:33 PM

They are already charged...unfortunately its pouring raining here.

Yeah I know what your dealing with the weather here in MN hasn't been real nice to us this year. Lots of cool days although we can't get any rain at all her in West Central MN. It's been cloudy, windy, and cold but just no rain. Summer can start any time now.

Jason

Jason MaxAmps

06-09-2009, 05:03 PM

Here's the link to the 2S2P 6.6 volt pack on the site:

http://www.maxamps.com/Life-4500-66-Pack.htm

Jason

belila

06-09-2009, 05:46 PM

Jason, what size would a 4, 5 and 6S pack be? Trying to figure out if they'll work in 1/8th.

Jason MaxAmps

06-09-2009, 06:20 PM

If you look at the pack sizes on our website for the 6500 packs they will be just about the same size as those. The 2S2P 4500 is pretty much the same as the 2S2P 6500 in size.

Jason

SS Pede

06-09-2009, 11:54 PM

This is very interesting technology indeed. I have been eyeing A123 for a long time but the odd form factor and low capacity for a "less than huge" size pack made me hesitate (along with lack of time/money to invest in a new battery setup). I like that these packs fit where a normal 6 cell or 2s pack would fit, and with a decent capacity. I like the fast charge rate and high cycle life. I like the claimed durability. My question is, are these claims true?

A123 is known and proven to be durable as heck and quite powerful. If this technology can match these qualities (no LVC required, fast charging, loooong cycle life, no risk of fire, etc.), then that would be great! I look forward to some good data being collected. A123 is the gold standard here in my opinion. If this pack comes close to A123 qualities but with better capacity and normal size (I don't mind the low voltage necessarily), then it's a home run for me. Time will tell. I would want these for years, not as a stepping stone to LiPo. As a basher I don't need to sacrifice durability and cycle life just to get a bit more power (which is what I would be doing choosing LiPo over LiFe).

These cells do look promising though. Look like soft-case A123 cells to me. They're even about the same capacity it seems.
I've heard about these too but they sort of dropped off my radar screen. Anyone got a link?

Jason MaxAmps

06-10-2009, 08:21 AM

The these are not claims.The numbers are true. As for them being "soft-case" A123 cells well that isn't true either. These cells have no connection to A123 at all.

J

BrandonWilcox

06-10-2009, 08:46 AM

Charged some packs last night at 20amps no problem. They didn't even get slightly warm. Guess I need a charger capable of 40 amps :) The 6.6v pack fit in a number of stock vehicles no problem. Unfortunately it was pouring yesterday and its still pouring today. Keep on eye on rccaraction.com for the full review.

Jason MaxAmps

06-10-2009, 10:29 AM

Ain't that cool!!! 20 amps nice and fast!! Brandon the heck with outside man, load up the Slash and hit the hallways!!!

Jason

Mark R

06-10-2009, 10:41 AM

Heck with the Slash indoors, run the Savage Flux over some cubicles.

4wdmt

06-10-2009, 10:48 AM

Heck with the Slash indoors, run the Savage Flux over some cubicles.

They will fit the Savage Flux battery compartment?

SS Pede

06-10-2009, 11:04 AM

The these are not claims.The numbers are true. As for them being "soft-case" A123 cells well that isn't true either. These cells have no connection to A123 at all.

J

Well until someone gets 1000 cycles on a pack in a high-demand situation, they are claims to me. Trust me, I am pulling for you guys and I would seriously consider buying a couple of these packs. I'm just waiting for a good base of user experiences to be built up. I love the numbers so far, just keep 'em coming.

I know they are not related to A123 in anything besides chemistry. But if there are actually soft-case A123 packs available then they would be good to shop against your product.

Brandon, these packs are waterproof man!!! Get out there!!! :)

Jason MaxAmps

06-10-2009, 11:17 AM

They will fit the Savage Flux battery compartment?

Yes they will fit the Savage Flux Trays. The 2S2P 4500 is the same general size as a 2S2P 6500 Li-Po pack.

2S2P 7.4 volt 6500: 45mm X 137mm X 25mm

2S2P 6.6 volt 4500 LiFe: 45mm X 138mm X 26mm(same flat format as lipos)

Well until someone gets 1000 cycles on a pack in a high-demand situation, they are claims to me. Trust me, I am pulling for you guys and I would seriously consider buying a couple of these packs. I'm just waiting for a good base of user experiences to be built up. I love the numbers so far, just keep 'em coming.

I know they are not related to A123 in anything besides chemistry. But if there are actually soft-case A123 packs available then they would be good to shop against your product.

Brandon, these packs are waterproof man!!! Get out there!!! :)

Trust me they aren't made by nor are they associated with A123 in any way.

-J

SS Pede

06-10-2009, 11:55 AM

Trust me they aren't made by nor are they associated with A123 in any way.
I know, I know. But surely they are competing with A123's products, aren't they? I think it is fair to try to make some comparisons, then. A123 has so far been the gold standard in LiFe. These packs appear to improve on what A123 has, in my opinion. That's why I'm excited about them.

Jason MaxAmps

06-10-2009, 12:30 PM

I guess you could say that. But comparisons between the two really can't be made. Your still dealing with two different cell formats which can affect any comparisons. Cell cooling and heating would likely be very different between the two. Now If you had another Li-Po style like ours then I would say game on as long as the capacity is the same.

Only time will tell at this point.

Anyways I'm off to the LHS to get some new front caster blocks for the Slash. Once I have it fixed I will shoot some video of it running the new 2S2P 6.6 volt 4500 LiFePo pack. Video should be up in the next day or two.

Jason

Jason MaxAmps

06-11-2009, 12:09 PM

All right then here's the test bed.

Traxxas Slash, Castle 5700 Mamba Max system powered by the 2S2P 4500 mAh Green Series LiFePo pack.

http://www.nitrokillers.com/picture.php?albumid=10&pictureid=292

http://www.nitrokillers.com/picture.php?albumid=10&pictureid=293

http://www.nitrokillers.com/picture.php?albumid=10&pictureid=294

http://www.nitrokillers.com/picture.php?albumid=10&pictureid=295

http://www.nitrokillers.com/picture.php?albumid=10&pictureid=296

As you can see the 4500 LiFePo is pretty much the same size as the 6500 Li-Po.

Video coming soon........

-J

Caster Racing

06-11-2009, 12:53 PM

Those will fit perfectly in the Caster battery trays then! Awesome, awesome, awesome....

Can you throw 2 in your fusion and let me know the run time you get?

Jason MaxAmps

06-11-2009, 01:15 PM

I have the guys making me a set to do just that. I would say a ruff guess with the 2650 CC motor and a step or two up in pinion gears should net a guy about 8 minutes total run time. Compared to the 15 minutes of solid run time I'm getting in the slash.

Jason

austinelse

06-11-2009, 05:03 PM

Guver,

To answer your charging question, it will get to around 80% before it starts trickling down the amp rate. At around 9C a full charge takes about 10 minutes. We did this with a Hyperion charger at 20 amps on a 1P 2250 pack. Full charge at 15C should take well under 10 minutes, assuming that we can find a charger that will charge at 67 amps:) and is not cost prohibitive.

I think most people will be very happy with a 10 minute charge time using the Hyperion chargers. Our factory ran cycle life testing at 10C and 15C on their equipment. There was no capacity loss over time between a 1C and a 15C charge rate with these cells.

I have also seen the data at 200 cycles with a 10C charge and 25C discharge, back to back charge/discharge. The capacity loss after 200 back to back cycles was less than 5%. These cells are VERY durable. It is perfect for the racers who abuse their batteries.

Keep in mind that our 1000 cycle claim and warranty is actually conservative. I have seen data showing the LiFePo4 cells at 2000 to 3000 cycles.

-Austin

guver

06-11-2009, 05:09 PM

Thanks, that's what I wanted to know. That's very good.

ts2006

06-12-2009, 12:12 PM

Jason MaxAmps

06-12-2009, 01:02 PM

It is nice to see a battery company take advantage of this technology. I have been running A123 2S 1100s in my MLST and Mini-t for a couple of years. The battery do not heat up, my run time is around 20 mins using a 8000kv motor, and at a charge of 5 amps they are charge up in about 8 mins., and are durable. I will never use lipos again.
Way to go Maxx Amps. Will you be producing batteries for the mini crowd?

We are looking into other sizes but at the same time we want decent capacity. So as the technology gets better we hope to see more cell size options with more usable capacity to them. Right now as you see with these cells the size is rather large for only being a 2250 cell.

Jason

guver

06-12-2009, 02:06 PM

That seems to be the trade off with this technology, heavier and less capacity (compared to Lipo). I've been waiting for along time and am happy to see it packaged in a square box instead of a round package.

Jason MaxAmps

06-12-2009, 04:46 PM

Guys I can honestly say I'm having a blast with this pack. My poor Slash is taking a beating. I've got the shop sending me a set to run in the Caster Fusion EX-1 but My poor Slash is gonna be hating life. With 3 packs, 15 minutes run times and 30 minute charge times it's not gonna get a break. I should have the Slash Video up on YouTube by late Saturday with the Fusion 1/8 scale buggy next week sometime.

Stay tuned for more.........

-J

4wdmt

06-12-2009, 05:07 PM

Any pics with the packs inside the Savage Flux battery compartment?

creech

06-12-2009, 05:19 PM

Any chance these will fit in those pesky Tamiya battery compartments? Yunno the ones that are form-fitted to a 6 cell pack. I have a bunch of old Tamiyas that I would love to find a newer battery technology for.

Jason MaxAmps

06-12-2009, 05:38 PM

Guys they are the same size as the 2S2P 6500 packs. So they will fit revo, e-maxx, savage flux, any battery tray that will hold a 6 cell shotgun pack. As far as the Tamiya trays most likely they won't work. I think our biggest Li-Po that you can squeeze into those types of trays is our 2S 4000 Li-Po pack.

Jason

Jason MaxAmps

06-13-2009, 11:46 PM

Here's 10 minutes of the 4500 LiFe-Po pack in action:

http://www.youtube.com/watch?v=Bkz99h8Q6-0

Sorry about the sound for some reason it's out of sequence a bit......

-Jason

Jason MaxAmps

06-15-2009, 09:37 AM

I should have video up in the next day or two with the Caster Fusion EX-1 with the CC Monster 2650 System powered by a pair of the 2S2P 4500 LiFePo packs.

Jason

Jason MaxAmps

06-15-2009, 01:58 PM

New packs are here. First test run in the Fusion this afternoon pending the rain holds off.

Jason

Jason MaxAmps

06-15-2009, 02:40 PM

OK new results. I just ran the packs in my Caster Fusion EX-1 with the CC 2650 motor 14T pinion and if I remeber either a 44 or 46 spur. Pack run time in 4S2P config was 13 minutes 30 seconds. Pack temps were 117 degrees with air temp at 76 degrees. Motor temp was 140 degrees fan was running at end of run for about 60 seconds so I would guess the esc wasn't much over 150 degrees. Now on the same little back yard track that I shot the Slash run on I was way over powered with this set-up and that meant a lot of on throttle and off throttle use. On a regular track of decent size with more open throttle runs I would guess that 8 to 10 minutes from these packs in an 1/8th scale would be the norm with higher run times of say 15 minutes to 18 in a bashing type scenario.

Video coming soon.......

Jason

Jason MaxAmps

06-16-2009, 10:24 AM

Here's the packs in the Caster Racing USA Fusion EX-1 Buggy with the Castle Creations 2650 Monster System........

http://www.nitrokillers.com/picture.php?albumid=10&pictureid=297

http://www.nitrokillers.com/picture.php?albumid=10&pictureid=298

As soon as the test track soaks the rain up I'll shoot some video.

Jason

Cain

06-16-2009, 11:11 AM

Where's the track you running at Jason? Always up to making a trip for some runnin!

Looking forward to the vids.

Jason MaxAmps

06-16-2009, 12:22 PM

Not much of a track Marco, it's just a section of my back yard mowed short and laid out just big enough to run tests on. I'm working on a 4 minute vid of the fusion right now.

Jason

rccardude04

06-16-2009, 01:29 PM

A 9.9v pack in a Slash could be entertainingly fun. Not so overwhelming like 3s lipo pack, but substantially quicker than a 2s lipo pack.

-Eric

Jason MaxAmps

06-16-2009, 02:34 PM

A 9.9v pack in a Slash could be entertainingly fun. Not so overwhelming like 3s lipo pack, but substantially quicker than a 2s lipo pack.

-Eric

Yes and it'll fit with the expansion kit from Traxxas. It'll be next on my test list.

-J

Jason MaxAmps

06-16-2009, 02:34 PM

Here's the 1/8th scale Caster Fusion buggy in action:

http://www.youtube.com/watch?v=0EcBcf2OPAw

-J

rccardude04

06-16-2009, 03:31 PM

Yes and it'll fit with the expansion kit from Traxxas. It'll be next on my test list.

-J

Do it!

-Eric

Jason MaxAmps

06-16-2009, 04:07 PM

Gotta fix the Slash first. The spur gear finally went out. Should have a new one in a day or two. Might be a week on the pack test. I'm waiting for the other options to be listed on the site.

Jason

Jason MaxAmps

06-16-2009, 04:20 PM

We've got the 2S2P through 6S2P packs on the site now.

http://www.maxamps.com/products.php?cat=223

Jason

BrandonWilcox

06-17-2009, 09:26 AM

Hey Guys,

Just a quick update for you. This Saturday I raced in my local Slash class, and finished 3rd in the A main out of 17 guys. I ran the Green Series Cells all day. There will be a review posted on rccaraction.com soon so keep an eye out! The only time i placed on the podium before that was over a year ago, and have been around 7-8th position consistently. So this is my first time back on the podium after a long time!

-Brandon

Jason MaxAmps

06-17-2009, 11:21 AM

Yeah buddy!!!! Way to go Brandon!!!

Jason

Jason MaxAmps

06-18-2009, 08:11 AM

Ok, you can now go here: http://www.maxamps.com/categories.php?cat=223

That link will take you to the main Listings for the Green Series cells.

You'll see the 2250 2S-6S, the 4500 2P packs, and the 6750 3P packs.

Enjoy

Cain

06-18-2009, 12:57 PM

Jason,

Need a little clarification, on the website for the battery packs it stated that you do not need a low voltage cutoff. However, in the 5 year warranty it states the following:

if the pack discharges under 2V per cell from over-discharging it will not be covered.

:confused:

Kudos though for having the 5 year warranty as a free option at this time. I think it would great if you guys went with the 3 and 5 year warranties as free and standard across the board.

Jason MaxAmps

06-18-2009, 03:12 PM

Attention!!! We are closing out the remaining Hyperion DUO II's
Hey Guys we have a limited supply of the Hyperion DUO II's left in stock. Close out price is at $249.99 plus whatever your membership discount level is at if your signed up. Check em out here:

http://www.maxamps.com/EOS0610i-DUO2.htm

This is great for the guy looking for a charger that will do our new 4500's at 10 amps. That's a 30 minute charge time. And two packs at once.

The New DUO III has 15 amps per side rather than the 10 amps than the DUO II and it also offers more memory and cycle modes for all battery types. The DUO II is still a great charger and now at a great price. Hurry up though last time I checked only 23 left in stock and they won't last long.

Jason

Jason MaxAmps

06-18-2009, 03:17 PM

Cain, they have a low voltage point of 2 volts per cell. In testing once they get to the 4.8 mark for a 6.6 volt pack your car won't move any further at that point. Chances of anyone draining a pack to that low of a point is very slim. My CBA II testing was done to the 2.0 volt point and the packs did fine with no ill affects. No matter what we run them in they never get that low. I ran my fusion with no LVC and came up with 4.8 per pack as well and that was driving it until it wouldn't even flinch.

Jason

SS Pede

06-19-2009, 12:39 AM

It's good to see that the Maxamps extended warranty for these packs is 5 years or 1000 cycles. Shows that they have some confidence in the life of these packs.

rccardude04

06-19-2009, 01:31 AM

Oh my gosh... I just thought of another product idea for you guys...

Market these cells as receiver packs!

I only request 5% of total receiver pack sales for my idea. :D

-Eric

Jason MaxAmps

06-19-2009, 07:59 AM

Sorry Eric,

Little late on that idea,LOL The 2S 2250's were looked at for that right away. It's a great pack for guys with larger Nitro and gas planes.

Jason

DOOD

06-19-2009, 07:05 PM

Will the 2s packs fit a 1/16 E-Revo or any plans to sell LiFePO4 packs for this class?

Thanks

Jason MaxAmps

06-20-2009, 07:46 AM

The current Green Series cell size is listed on the site.The foot print of these is the same as a 6 cell shot gun pack so no they won't fir in the mini's. We are looking into a smaller version.

Jason

SS Pede

06-21-2009, 01:18 PM

People definitely use 2s A123 as a receiver pack, so these might be a similarly good fit. Hey, what about the discharge voltage curve on these cells? Is it very flat, then drops off very abruptly when the pack is discharged? A123's are remarkably consistent in this sense. And I'm sorry to keep bringing up A123, but in my mind that is what the Maxamps cells are up against.

Jason MaxAmps

06-22-2009, 07:51 AM

The discharge is very similar to that of a Li-Po but the end dump is like a Nimh pack seeing you have no cut off to worry about.

Jason

Jason MaxAmps

06-22-2009, 12:59 PM

MaxAmps Fans,

Introducing the brand new life "Green Series" packs. http://www.maxamps.com/categories.php?cat=223

For the next 24 hours:

*FREE 5 year-1000 cycle warranty for all "life" packs

*FREE 3 year 300 cycle warranty on all of our "lipo" packs

Just choose the free warranty upgrade from the drop down menu on your packs.

Also check out other new products from MaxAmps.com:
*5000mah NIMH cells- Replaced our 4700 cells with more punch and capacity but without a price increase. http://www.maxamps.com/products.php?cat=79

*MaxAmps 1/16th Scale VXL E-Revo and Slash packs/kits- Brand new packs designed specifically for the new Traxxas 1/16th scale vehicles. 2S to 4S set ups are available with capacity up to 4400mah! Speeds up to 60+ mph on 3S! http://www.maxamps.com/products.php?cat=221 http://www.maxamps.com/products.php?cat=222

*MaxAmps AA Alkaline Cells- New alkaline cells designed for RC applications. These are great for transmitters and receivers or any other high draw applications like digital cameras and portable electronics. http://www.maxamps.com/MA-AA-Alkaline.htm

Best Regards,

The MaxAmps Team

www.MaxAmps.com
__________________

rccardude04

06-22-2009, 01:28 PM

Jason MaxAmps

06-22-2009, 02:09 PM

Holy crap, 5-year 1000 cycles? I know that's not normally free but wow.

My question is though... How strict are you with the warranty claims? Will you replace basically any pack? Or will you be annoyingly strict about a couple of dents like some companies are?

-Eric

Each situation is different it. There's the obvious it flew out of the car damage then there is the obvious wear and tear that can been seen from just sitting in a battery tray. If it's normal wear and tear we don't hold that against you. We take it one case at a time and hope that the customer is up front with us about the info we ask for. But we have seen it all over the years so we pretty much no what's what.

Jason

Ihaveaxrayt2r

06-22-2009, 03:01 PM

So, we need a special charger to charge these? I'm a correct?
Because I would like to own some of these in the future, when you make them for the 1/16 traxxas trucks?

So, I can't charge them on my ICE?

Jason MaxAmps

06-22-2009, 03:54 PM

Any charger that will do A123or Life cells will work. If I remember correctly the ICE will do the A123/Life Cells. Just check the manual for your charger to see what it can and can't charge. Just about all the Hyperion chargers will work on these and they can do the higher charge rates as well. Up to 20 amps can be done with the 720i or 15 amps with the new DUO III.

Jason

ts2006

06-22-2009, 06:03 PM

The ICE charger is not made to charge A123/Life cells. I purchase the losi lithium charge converter (LOSB9607). It allows chargers that do not have the capacity to charge A123/LIFE batteries to safely charge them. I think the cost is about $35 and change. I have been using it for about 2 years now with no problems. You dont need to buy a new charger fro the LIFE cells.

Just my 2 cents

Jason MaxAmps

06-22-2009, 09:59 PM

Correct sorry about that that's why I said "Just check the manual for your charger to see what it can and can't charge." The Onyx 230 will do Life cells. You should by a new charger, conversion units are not the best route. A newer charger will be fully up to date on current charging for the newer battery types.

Jason

ts2006

06-22-2009, 10:17 PM

Jason I think that having MaxAmps bring this product out is good for the electric rc field. Keep up the good work

Jason MaxAmps

06-23-2009, 08:00 AM

Jason I think that having MaxAmps bring this product out is good for the electric rc field. Keep up the good work

Thank you for those kind words.That means a lot.

Jason

Jason MaxAmps

06-23-2009, 03:51 PM

Also don't forget to check out our close out sale on the last of the Hyperion DUO II chargers. $250.00 plus what ever you have for a discount percentage if your a registered maxamps.com member. With a 10% discount level you can get a DUO II for $225.00 but hurry we only have 16 DUO II's left. That's a charger that will do two LiFe Packs at 10 amps each.

http://www.maxamps.com/EOS0610i-DUO2.htm

Jason

Racer Rob

06-24-2009, 05:14 PM

I like that you can run them down without worry. Fast re-charge time has me interested as well.

I am just looking forward to the prices coming down as they get more popular. I miss $50 packs....

Jason MaxAmps

06-24-2009, 05:34 PM

Yeah the no worry factor is great I have three packs at home and can rifle through them all day long in the back yard. It's a blast. I just have to remember to allow some cool down time for the Slash. LOL

-Jason

Jason MaxAmps

06-29-2009, 03:24 PM

Hey Guys,

As of 2:19 PM Central Time we have 5 DUO II's left in stock at this great price!!! $250.00 Plus your membership discount.

Jason

Jason MaxAmps

06-30-2009, 04:12 PM

As of 2:58 PM Central time only two DUO II's left.

Jason

Jason MaxAmps

07-23-2009, 09:10 AM

Hey Guy and Gals check this out. http://www.nitrokillers.com/showthread.php?p=14529#post14529

In the video watch the all "White" Traxxas Slash. That is one of our team drivers Dennis "The Shark" Fulkerson (seen in his wheelchair at the right of the screen) running a 2S2P 6.6 volt 4500 MaxAmps.com Green Series LiFe-Po pack. And yes he won the race. Dennis is on rails!!! Way to go bud!!!!!

Jason

Rckcrwlr

07-23-2009, 10:41 AM

Jason MaxAmps

07-23-2009, 10:45 AM

Yeah it's pretty wild!! Dennis has to lay the transmitter on his lap in a custom wood support frame. That frame is what grips and holds the transmitter while he works the throttle and the wheel. I've watched tons of his video's and whether it's him driving his Slash or his Sprint car he's always in a groove.

Jason

SS Pede

07-23-2009, 11:53 PM

So these packs, while punchy, will offer a bit less top speed at a given gearing due to the slightly lower voltage. I'm wondering if anyone has geared their vehicle up a little bit to gain that top speed back, relying on the high discharge rating to provide powerful acceleration even at the higher gearing. Has anyone (Jason?) experimented with gearing on these packs?

Jason MaxAmps

07-24-2009, 08:11 AM

That's exactly what you do any time you drop in voltage your can do two things gear up or go with a higher KV motor. I run my Slash on a 5700 Mamba geared 18/86 and it's speed right now is right there between what a 6 cell and 7 cell NimH will do. We have a couple of our guys running these packs in Slash classes and they see the same results. Their able to win because they can stay in control. I think if I remember right Dennis was 15 or 16/86 in the circle track video.

Jason

NiMo

08-06-2009, 02:45 PM

Have just ordered one of these packs for my Tamiya F104 as that car does not accept brick shaped LiPo's to fit without modification, and even then will not slide in and out, so my plan is to build the car up around this pack.
just hope there are no problems shipping to the UK.
Ordered it without a case as it should then fit in without modifying the car, and it should be safe in there from impact.
Just need to sort out a 10A (or 15A) field charger, as my current LiPo charger only goes up to 4A and doesn't list LiFe.

Rckcrwlr

08-06-2009, 02:53 PM

Jason,
What are people running in a stock motor set up for the slash???

I would like to go to these but not sure about the voltage loss with a OEM motor.

Jason MaxAmps

08-06-2009, 05:31 PM

Stock motor and just step up in Pinion size. With Brushless Pinion change works and going up in motor KV adds to it. You'll just have to play with the gearing and see what you can do with the track conditions you have. As always watch motor temps when adjusting gearing. My CC5700 runs at 18/86 right now. I didn't get to do any brushed version testing as my motor was shot after 3 Li-Po's.

Jason

NiMo

08-18-2009, 06:29 PM

Was hoping to report on this battery, but it has still to arrive 12 days after being sent

Jason MaxAmps

08-19-2009, 09:04 AM

Was hoping to report on this battery, but it has still to arrive 12 days after being sent

International shipping times can vary from 1 to 4 weeks. It all depends on how long the item sits in customs.

Jason

Ginsu

08-19-2009, 10:34 AM

BrandonWilcox

08-19-2009, 11:11 AM

One guys was on here saying he would not run maxamps but never stated what his problem was so why even post.

secondly can you charge this pack on a ice charger?

will these packs be on rctvlive for review so we can get a third opinnion>

Here is the review I did on these packs:

http://www.rccaraction.com/ME2/dirmod.asp?sid=E29CAE68A6D4457BA0FB171BEC7D56D2&nm=Site+Features&type=news&mod=News&mid=9A02E3B96F2A415ABC72CB5F516B4C10&tier=3&nid=29A19DC6BC014E1CBD4F057443E6AB5E

-Brandon

Jason MaxAmps

08-19-2009, 12:14 PM

secondly can you charge this pack on a ice charger?

Check your chargers specs in the manual that came with it. Your charger must be able to charge A123 or LiFe-Po Type cells.

Jason

NiMo

08-19-2009, 02:38 PM

International shipping times can vary from 1 to 4 weeks. It all depends on how long the item sits in customs.

Jason

Normal delivery days from Nexus is 3 to 4 days

Jason MaxAmps

08-19-2009, 03:53 PM

If you chose standard shipping 1 to 4 weeks is normal. If you chose express 3 to 4 days is possible. If you'd like give me the order number I can check the order.

-J

NiMo

08-19-2009, 05:02 PM

If you chose standard shipping 1 to 4 weeks is normal. If you chose express 3 to 4 days is possible. If you'd like give me the order number I can check the order.

-J

Order ID: 126320

it was standard shipping, which is the norm from America
Also the tracking number cannot be used from this country

Jason MaxAmps

08-19-2009, 05:50 PM

I'm heading out to the shop in Spokane for a week. I leave Thursday. I'll check into the order in the afternoon when I get to the shop and will report back for you.

Jason

Jason MaxAmps

08-22-2009, 10:17 AM

I checked the order Friday at the shop and the standard shipping info says it is in route to you.

Jason

NiMo

08-22-2009, 01:20 PM

Going to be hard to convince others to try one if shipping takes so long :(

gixxer

08-22-2009, 08:18 PM

Any chance these Series Life will go into recievers. I wonder if 6.6v would work well on standrad 6v servos?

Jason MaxAmps

08-23-2009, 12:36 PM

Going to be hard to convince others to try one if shipping takes so long :(

As I said you selected standard shipping. That is through the USPS service. We don't have any control of the speed they move items at or how long customs services can sit on the item. You could have easily chosen to select express shipping. Standard shipping here in the US is priority 2 to 3 day service and it's been that way for a few years now.

Any chance these Series Life will go into recievers. I wonder if 6.6v would work well on standrad 6v servos?

We are working on some smaller cells at this time but the issue is still the same. The Life cells run about half the capacity as a similar physical sized Li-Po. the smaller we go in Life cell size the capacity gets pretty low. I think as the technology improves over time we'll see the capacity of these new Life cells improve.

On another note, I had a YouTube'r request a video of the Life cells being used in a Bone stock e-maxx. Well we took the one we had at the shop, loaded up a set of 4500 LiFe packs and shot a quick video of it tearing around on Friday at one of my co-workers houses out here in Spokane, WA.
I'll get the video up later this week. It went pretty good just with stock gearing but with a couple larger pinion gears it could be improved on.They way it was stock was still plenty for ripping and spinning around.

Jason

shiffs

08-24-2009, 04:51 PM

Just ordered a 4s2p with shell for my tekno converted sc8. The advertised weight is similar to my current 2x 5000 hard shell packs ran in series. 4500mah is not all that far off from 5000mah (10 min vs. 12 min?). 13.2v vs. 14.8v shouldent be to much of a problem considering my severe traction issues as it is...

ill be sure to let you all know how it runs!

Jason: Is there a break in cycle on these packs?

Thanks,
~JaSoN

Jason MaxAmps

08-24-2009, 06:01 PM

You'll notice the more you run the packs the better they get. Around 20 cycles they are what you could say broke in.

Jason

NiMo

08-27-2009, 05:34 AM

OK so the pack arrived yesterday (with a £20 ($32.40) customs charge so has made the pack very costly.
Now the dimensions listed on the web site are:
45mm X 138mm X 26mm(same flat format as lipos)
I ordered the uncased version so should be at that size (or smaller) so it would fit in my Tamiya F104 just right (I thought), well the uncased shrink wrap pack is actually:
46.5mm x 140mm x 26mm
but then there is another catch!!!
the corner where the wires come out there is something under the wrapping that makes the pack thicker, and on that one corner it is 28mm, so the top deck of the F104 wont fit because of that one corner, shame as it would have been the perfect fit as the gap between upper and lower deck is 26mm.

Not happy :(

austinelse

08-27-2009, 12:43 PM

NiMo,

I am very sorry that the mail service took so long. I know what it is like to wait for stuff in the mail. I hate it too:) I also hate being stuck with a ton of duties and taxes so I understand where you are coming from there also.

Can you send me a picture of the corner wire issue. We have fit the pack in every 10th scale car we have at the shop with no issues.

It should be set up to be flush with the top of the pack. If the 26mm dimension is the only issue keeping the pack from fitting, then we should be able to make it happen. Can you send a picture of the pack sitting in the tray. What are you using to measure your pack dimensions? We measured the pack with calipers to get the dimensions listed on the website.

My email is austin@maxamps.com

-Austin Else
CEO MaxAmps.com

shiffs

08-27-2009, 03:50 PM

Received the pack today, as well as the 20 amp hyperion charger. My current power supply is 10 amp max, i plan on charging at 2c (9amps).

Im in TX and received it in two days!

Testing this weekend...

Jason: Just to double check, there is no concerns of high amp draw bursts / 2c charge rates on its first cycles? Just want to make sure I do things right.

Thanks,
~JaSoN

NiMo

08-27-2009, 06:11 PM

Can you send me a picture of the corner wire issue. We have fit the pack in every 10th scale car we have at the shop with no issues.

It should be set up to be flush with the top of the pack. If the 26mm dimension is the only issue keeping the pack from fitting, then we should be able to make it happen. Can you send a picture of the pack sitting in the tray. What are you using to measure your pack dimensions? We measured the pack with calipers to get the dimensions listed on the website.

My email is austin@maxamps.com

-Austin Else
CEO MaxAmps.com

I will take pictures tomorrow, almost bed time here.
There is a bulge on both sides in one corner, just like some extra tape has been put on something before it was wrapped.
It is not in a tray, is it a sandwich between an upper and lower plate, gap is 26mm so pack would have fitted if not for the bulge.
Pack was measured with calipers, rest of pack is a perfect 26mm.
I have now built the F104 around a 24mm LiPo pack (spent today doing it), just hope it charges up quick enough between heats

Jason MaxAmps

08-28-2009, 08:18 AM

SS Pede

08-30-2009, 11:26 PM

How about storage for these packs? Say you run one until you start losing power. Do you just pull it out of the vehicle and let it sit until its next use? I'm sure you could do this of course, but what do the packs really LIKE you to do with them in between runs? Store with partial charge?

Jason MaxAmps

08-31-2009, 08:38 AM

Same Storage rules as Li-Po's. Run then charge. If they are going to sit for a week or more do a 60% capacity storage charge.

Jason

Jason MaxAmps

09-01-2009, 10:48 AM

New Video!! Bone Stock E-Maxx on 2 4500 6.6 volt MaxAmps.com Green Series LiFe-Po packs. Stock gearing.

http://www.youtube.com/watch?v=Y9XlEuZXMEI

Jason

NORTEX-T1FK

09-10-2009, 12:02 AM

I dont feel like scrolling through all the pages so is there some one who can tell me what these peak at when fully charged? And can i charge them on a LiPo charger?

Thanks.

SS Pede

09-10-2009, 01:30 AM

Same Storage rules as Li-Po's. Run then charge. If they are going to sit for a week or more do a 60% capacity storage charge.
I would hope, though, that these packs aren't nearly as susceptible to serious damage as LiPo packs are if left at low voltage.

I dont feel like scrolling through all the pages so is there some one who can tell me what these peak at when fully charged? And can i charge them on a LiPo charger?
They reach 3.6 volts per cell at full charge, so a 2s pack will be 7.2 volts fully charged. It doesn't sound like you'll get smoke and flames if you charge them to 4.2 volts per cell on a LiPo charger, but they really do need their own charging profile. The charger needs to be able to charge "LiFe" packs.

Jason MaxAmps

09-10-2009, 07:52 AM

I dont feel like scrolling through all the pages so is there some one who can tell me what these peak at when fully charged? And can i charge them on a LiPo charger?

Thanks.

Yes 3.6 per cell or 7.2 for a 2S pack. And NO they MUST be charged with an approved Life-Po cell or A123 charger DO NOT charge with a Li-Po charger.

Jason