Airsoft batteries come in a variety of voltages, milliamps and sizes. LiFe batteries require a balanced smart charger to properly charge. 9.9V batteries will give players a noticeable increase in rounds per second, but will place less stress on the internals of an AEG than a LiPo battery. LiFe batteries are typically similar in size of standard NiMH batteries, but pack more of a punch. Airsoft Megastore carries a wide selection of airsoft batteries, backed by our industry leading 110% LOWEST price guarantee!