Zerolemon Travel External Battery Charger for Samsung Galaxy S3 I9300 / Galaxy S4 I9500 / and Also Galaxy S4 Active I9295 - Fastest External Charger This item is Compatible with the ZeroLemon Worlds Highest Capacity Extended battery for the Galaxy S3 / Galaxy S4 i9500 / And ALSO Galaxy S4 Active i9295 This item is compatible with OEM versions of the battery, ZeroLemon's Slim battery and even the EXTENDED battery! Automatically stops charging when battery is full. FASTEST CHARGER ON THE MARKET Color designed for uniqueness and visibility. USB output: DC 5.0V, 600mAh / Desktop charging output: DC 4.20V, 600mAh.