Ohpa Wireless Charger Receiver Battery Back Cover Case For SamSung Galaxy Note 4 SM-N910 (Black) Utilizing the Qi global standard for inductive charging, you can now charge your Galaxy Note 4 phone without the need to plug in. Once the battery cover is installed, simply place your device directly onto the Samsung Wireless Charging Pad (sold separately) and your phone begins to charge. Lightweight, does not add weight to your phone. Simple design, does not affect the appearance of your phone.