> To get any longevity at all depth-of-dischg needs to be limited to 10V. > > Unless you're selling batteries... =A0:) Or unless you're using 12V LiFePO4 packs (4 cells). Higher is better but 8V is OK. A truly Goodenough* battery! Russell * Groan: http://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .