Dead Battery Hand Warmer

by DIY Hacks and How Tos

Alkaline batteries will usually stop being able to power your electronics long before they are empty. One way to use that last bit of energy is as a hand warmer.

Once your battery is mostly dead, use a 1 ohm resistor (or an equivalent length of wire with at least 1 ohm of resistance) to bridge the terminals. This will slowly drain out the last of the stored energy and release it as heat. This can make a very low powered hand warmer. It won't make a lot of heat, but every bit helps.

Content by Jason Poel Smith (DIY Hacks and How Tos). Used under Creative Commons 2.5 BY-NC-SA Licence. Changes were made to the original content.