-3
votes
1answer
265 views

How high charging temperature causes damage to AA size NiMH cell

I used a portable thermometer and put on top of a battery charger. I notice that the temperature reach 39 degree Celsius and I can feel the warmth when I put my hand on top of the charger & the ...
2
votes
1answer
142 views

LSD NiMH cells that provide reasonable capacity even in subfreezing temperatures

Sanyo claims that 2000 mAh Eneloop LSD AA NiMH batteries provide about 1400 mAh at -10 °C (-15 °F). I wonder if only Eneloops provide reasonable capacity in the cold, or if the competition does too. ...
2
votes
1answer
497 views

How can I determine the resistance needed to heat a wire to a specific temperature? [duplicate]

Possible Duplicate: How do I calculate the temperature rise in a copper conductor? I want to have a AA battery heat up a copper wire .12mm diameter, but want it to heat up to 302°F, not ...
2
votes
2answers
168 views

What rechargeable battery is suitable for severe frost (−10 Celsius and below)?

Suppose I want a rechargeable battery for a hybrid electric vehicle like Toyota Prius - one that can power the vehicle traction motor at low speeds. The vehicle would have to operate in a region where ...
6
votes
2answers
377 views

Small batteries for use in cold (but not freezing) environments?

I'm building a small, low-power device that will be used inside a standard consumer refrigerator (approximately 2°C). I've had trouble with Alkaline batteries at low temperatures, and was wondering ...