Compatible with Samsung Galaxy S5</br>The battery charger rapidly charges your spare Samsung Galaxy S5 battery</br>USB Port output and battery charging at the same time Talk and charging at the same time?? no influence to signal.</br>Quick charge with automatic constant current control prevents battery from overcharging?? short circuit?? and electronic shock</br>Charger is designed with a foldable A / C plug that charges your cellphone battery anywhere<