GVKAR NEW 3200mAh Rechargeable Extended Backup Battery Case Cover for Samsung Galaxy Note 2 Note II N7100 (black) Battery Type: Li-polymer battery cells. Capacity: 3200mAh. Input: DC5V / 500mA. Output: DC5V / 800mA. Charging time: 4-6 hours. Color: Black. Weight: 275g. Indicator shows power status of external battery. To charge the portable battery, simply plug in the USB contactor into the portable battery. The other end contact to either an USB power adapter or an USB socket of a computer. To charge the phone, simply slide the phone into the portable battery and slide ON-OFF switch to on.