Long hours of mobile gaming can drain your PSP battery, so it's good to keep a few spares laying around for those times when you don't want your fun to be interrupted. Just make certain that you buy a battery that is compatible with your PSP model. There are PSP batteries available from many wholesale dealers which will last even longer than the batteries that came with your device. Have a look at what's available. Some of the best PSP battery packs are external and give you the ability to charge your regular batteries when you are away from electric sockets.