> Everyone knows that the best battery is Lithium-Ion, but the problem > with overcharging and overtemperature is so serious that I don't > consider LiIon at all for solar applications. Mostly sounds somewhat familiar. I would be extremely interested in knowing how you rate LiFePO4 as opposed to standard LiIon. Russell --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .