OSTENT 2400mAh External Battery Charger Power Storage Pack Compatible for Sony PSP 2000 3000 Color Black Ideal design for providing a lot of stored power to charge up your battery in case of low battery of your PSP Just connect to the PSP and charge the battery easily Can use AC adaptor to charge itself for power backup storage Intelligent self-protection system, protecting the battery from overcharge, over discharger and over current Extra long battery for playing game system