Capacity of battery 4500mAh input DC5.0V/1000mA output DC 5.0V/1000mA Battery polymer lithium ion battery Specifications: Capacity of battery4500mAhinputDC5.0V/1000mAoutputDC 5.0V/1000mABatterypolymer lithium ion batteryCan be used forPDA,PSP,MP4,Mobile Telephone,IPhone,Bluetooth Earphone etcportmini USBcharing time5-7 hoursoutput interfaceUSBDimension123*43*18 4500 mAh Slim portable Power Bank