Originally Posted By: jzmtl
Hmm, from what I read on flashlights Li ion actually cannot take any top up charge at all once it's full, but NiMH can.


LiOn and LiPo batteries should not be charged once they're fully charged, however the charge controllers "float" them at that point. That's why you can plug your iPhone, Mophie Juice Pack, laptop or whatever in and leave it plugged in all night. I imagine if you tried you could find a LiOn or a LiPo battery without a charger and then find a charger that didn't know how to deal with them, but I'm assuming that you're not trying to start a fire laugh.