help with chargers amp rate

[DASHer]

i want to buy a peak charger and it isnt a timer charger. which is what i am used to. my charger will output 4.0 amps. it is the new DuraTrax® Piranha DC Peak Charger NiCd/NiMH. i really want it because it is inexpensive and can charge a large range of battery packs. i just want to figure out how to determine how many hours to leave my battery packs charge. an equation would be helpful, or just plain english too.

[Sharkey]

ok, the formula is

battery capacity/ charge rate=charge time

but thats the beauty of a peak charger, you dont have to wory about how long to charge them, its all automatic.

[jstock]

I just picked up the Duratrax IntelliPeak Mini Pulse Charger and (2) Duratrax Shark 1500mAh packs. I was wondering what's the best way to charge these packs. I have no clue what amp rate to use or what type of charge: (discharge + peak, just peak, etc...)

Can anybody shed some light on a newbie's question?

Thanks!!

Jay

[Sharkey]

discharge at 10 amps. a good charge rate is 4 amps. i charge packs higher, but they are higher capacity cells. 4 amps should work just fine.

[jstock]

Thanks so much! I think I can only discharge at 2 amps. How long should it take to charge at 4 amps?

[jeffr147]

battery capacity/ charge rate=charge time
1500/4000=.375 hours or 22.5 minutes approximately

[jstock]

Thanks!