Zacro USB Wall Travel Spare Battery Charger for Samsung Galaxy S4 i9500 Charger, Samsung Galaxy S3 i9300 Specialized Battery wall charger, the charging pins are fixed and only fit for Samsung Galaxy S4 i9500 Charger, Samsung Galaxy S3 i9300 USB Port output and battery charging at the same time Talk and charging at the same time, no influence to signal Quick charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock Charger is designed with a foldable A/C plug that charges your cellphone battery anywhere Input: AC 100 - 240V/50 - 60Hz/200mA; Output: DC4.35V -600mA(Battery) /DC5.2V-1000mA(USB)