On Wed, Nov 25, 2009 at 1:50 PM, M.L. wrote: > It depends on how "smart" the chargers are. If they have any smarts at > all, they will cut out at a voltage somewhere close to 14 volts. So > no, your batteries will never get fully charged if you put a diode in > series with the charger. Ok, no diode. I'll work something out with a switch for this prototype and we'll see what happens in the final. These chargers seem somewhat smart, so they'll switch from fast charge to float when the battery is nearing capacity. If that's the case, how can I estimate charging time? My pack will be 7AH. Given a charger of 750mA should it take roughly 10 hours to charge? If I went with the 1.25A model would it then take about 5.5 hours? Thanks! Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist