insten rechargeable battery compatible with sony psp 1000 1001 high capacity 1800mah battery pack us (not compatible with psp-2000 or 3000 or psp slim) insten never run out of battery power when you are about to score the winning point. save money and protect the environment by using the rechargeable battery. battery need to be charged before first use. voltage: 3.6v. accessory only. device is not included.