TNP Battery Pack 1000 mAh External Rechargeable Extended Power Bank for Sony Playstation 4 PS4 Wireless Controller [Playstation 4] Specially designed for Sony PS4 controller to extend playtime. 1000 mAh battery significantly increases play time Rechargeable via any standard Micro-USB cable Easily attaches to the back of the PS4 Controller, no complex installation required Works in conjunction with the internal battery to provide the maximum amount of play time Designed to be lightweight and keep controllers ergonomics in tact