> Planning on doing a PIC -based charger (to control charge time, LED mode > display to user, PWM operation, and other) that pulse charges using PWM > waveform for say 3seconds then shorts all batteries for 100msec, cycling. > Apparently this charging scheme is the one to go for, for long life of your Presumably you mean 'load" rather than "short". Shirting would reduce the life of battery and, quite possibly, charger. Dendrites would be unlikely though :-) RM -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.