ElementDigital(TM) Newest 2400mAH Rechargeable Cycle Backup Battery External Battery for PSP 3000 PSP 2000 (Black) High-capacity Li-ion battery intended for uninterrupted play on PSP 2000/3000 game consoles Mountable on the back of the game console and over-charge protection Provides extra power for long trips and as an emergency backup Can be Rechargerable by PSP adapter Attention:Only Suit for PSP2000/PSP3000, Not fit for PSP GO/PSP1000