I re-learned this lesson last night when my helmet light quit because I left it on the bike in the cold while I was at the polls voting.
Originally Posted by
windhchaser
I just ordered 2 litium rechargeable batts and the charger for like 10 bucks a course they wont work in all lights since there like 4 volts.But they work on my led flashlight.there the same exact size of a aa battery
Where did you find Lithium rechargeables that are the size of AA? my lithium rechargeable are like... single A? B? if there were such a size... definitely bigger than AA. and yes, there's also the 3.7 volt problem.