Originally Posted by
balto charlie
AA NiMH batteries should be charged as individuals. The better chargers will charge 1, 2, 3 ...etc. When the charger senses a full charge on individual batteries they stop charging it but continue to charge others. Cheap chargers charge batteries as groups thus overcharging some.
I have a Radio Shack charger at home that does them individually (4x1 bay). The charger that comes with the Dinotte 140L tail light charges two at a time in two separate banks (2x2 bay).
The lithium-ion batteries are charged as a single unit even though internally they are separate cells. I wonder why NiMH can't be charged the same way?
Nevermind... found this:
http://www.powerstream.com/NiMH.htm