Compatible with PSP and PSP Slim. Doubles the battery life: Adds a capacity of 2400mAh to your PSP console?s current battery. Total capacity: 4200mAh with the PSP (1000 series) and 3600mAh with the PSP Slim (2000 series). Adds an ergonomic grip for gaming. Mechanical system with 3 positions: Open position: for gaming. Stand position: for watching videos. Closed position: to protect the screen.