Lightweight Receiver Batteries

[squarebird]

Does anyone have an idea on what I could use to power the radio gear of a micro glider
that will be as light as possible? I am using the Hitec Feather receiver and HS-55 servos. The AAA receiver pack that the radio comes with is just too heavy. What kind of pack is used on co2 or rubber-band airplanes?

[Graham Stabler]

you could just use four 50mAh nicads or the new 70mAh nimhs from wes technik which are lighter.

[flyingbuddy]

A pack of four 120mAh NiMH cells would weigh about 14g, and the 50mAh NiCd pack is about 16g. A Duracell 28L non-rechargeable lithium battery ($5.69 at Home Depot) weighs 8.9g, but you have to solder the wires to the battery. Use a Dremel with a wire wheel to roughen the surface of the battery contacts so that solder will adhere to it. Your radio gear is not the lightest. See my post that has radio weights, and see the article in the May, 2000 RC Microflight on lightening the HS-50 servo to 4grams.
Graham, how much do the 70mAh cells weigh and what current can you get from them? I heard they are only good for about 300mA before heating up. The 120mAh cells are good to at least 1.5A.

[flyingbuddy]

The Duracell 28L battery is 6 volts. Unloaded, mine measued 6.475V.
Rated capacity is 160mAh, but they can not put out much current. The rating is 80mA.