Thanks for the info. Ok this is what I have been thinking. Maybe you can tell me if this would work or not. Im thinking of getting 4 RC 6cell packs (7.2V 3300mAh each) I was going to try wiring them up in pairs in series so I would have two sets at 14.4V 3300mAh. Then I was going to wire those two up in parallel so I would have 14.4V 6600mAh for extended play time. Am I correct in this? Or would I blow something up? Thanks!!