Product Description:Charge Dock For Samsung Galaxy S4 i9500 BatteryAs a battery case keeps your backup batteryCompact and fashion designWith LED indicate lightMicro USB charging portWork with wall charger， car charger， PC or laptopInput: 5V 500mAhOutput: 4.35V 450mAhSafe using with over-charge and short-circuit proetctionPlease kindly note: This item doesn't include the battery.Package includes:1 × White USB Battery Charger Dock Battery Case For Samsung Galaxy S IV S4 i9500 (With Pack)