Product Feature: 100% brand new. Easy to charge your battery without the phone. More convenience to interchange your standby batteries. Phone and backup battery charging a simultaneous easily. Charge from a USB port or power outlet. Charging stop once battery is full. Never overcharge keeps the performance and life of the battery. Input:Ac 100-240V~50\/60Hz 0.15A Output:Dc 4.2V~350mA~!#!amp!*!plusmn;50mA USB 5.2Vd.c.800mA Plug type:USA Standard Compatible with: Samsung Galaxy Note i9220 Package Included: 1x US USB Dock Charger