"3000mAh Mobile Power Bank Aluminium case TB-02 3000 mAh Blue Output Voltage: 5V~5.5V Output Current: 1000mA (max) Input Voltage: 5V Input Current: 800mA Dimensions: 77x61x15.4mm Battery type: Li-polymer battery" Portable power bank (External battery) is used as Backup power for your mobile phone, mp3/4, psp, laptop, tablet...