i have the hyperion charger and it does up to 6 cell lipos. and i dont think im going to go g3r any more. so i think next week i well be ordering the 6 cell zippy pack. i was kinda worried about buying it and then it like puffing on me or even low voltage. (even tought i know how to get around that.) but that 3 month warrenty kinda helps lol.