Originally Posted by
Tourist in MSN
I use rechargeable AAA batteries, NiMH. Eneloop batteries are good and Amazon carries them, but you also need a recharger.
This does not pertain to the original issue, but rechargeable lithium AAA and AA are now available. Their capacity is lower than NiMH, given the internal circuitry that takes space. However, they provide stable 1.5V voltage and are far less vulnerable to low temp than NiMH. I switched to those for the bike and do not look back.