High capacity quality lithium ion polymer battery pack Fits right in the battery slot, and you cover it with the battery cover for PSP Voltage: 3.6V, capacity: real 2200mAh, model: PSP-280 Upgraded version of Sony PSP-110 1800mAh battery pack Compatible with model: Sony PSP 1000 (1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1010), PSP Fat