1) External power supply for Sony PSP; 2) High capacity Li-ion polymer cell that can operate more than 10 hours; 3) Can supply power to PSP while charging original PSP battery 4) Can also operate without original PSP battery; 5) Build-in safety IC to protect product from over-charge, over-discharge or over-current 6) Capacity: 4500mAh; 7) Output Voltage: 5V; 8) Output Current: 1A 9) Charging Requirement: 5V DC/2A; 10) Charging time: less than 6 hours; 11) Service lifespan: More than 500 charging times; 12) Operating temperature: -10 to 40C degrees: 13) Storing temperature: -20 to 45C degrees: 14) The product can only be charged through Sony PSP adaptor