DiGiYes&reg; Qi Standard Wireless Charger Charging Receiver Module for Samsung Galaxy S4 / i9500 (S4) Wireless Charging: Simply stick the receiver pad to the phone battery, put the phone on a wireless charging dock (not included). Ultra thin and light weight design, no need to change your phone cover. Enable your Samsung Galaxy S4 wireless charging function. Light Weight Design: You won't feel any extra weight when stick the receiver pad to the battery of your device. No interfere with other functions on your phone.