You play it non-stop, 24/7, every waking moment, until your thumbs are numb. If your PSP was powered by gaming fever, you would never stop. But it isn"t, so every now and then you need to charge that battery. Integrated USB outlet powers any USB-based handheld device. Folding prongs make it travel-friendly. Just plug the uSB into your PSP and continue gaming, completely uninterrupted. You can also transfer data from your computer as you power up.