GamesDur PS4 Portable Battery Pack - Rechargeable 1200mAh External Power Bank with LED Indicator Light and USB Cable for Sony PlayStation 4 Controller Gamepad Black Ergonomic Design will keep your hand comfortable when long time use Saving energy and protecting environment, easy to use, just plug and charge LED Power indicator is meaning the battery capacity and the LED indicator will light steadily during charging Output short circuit protection, when the output port shorted,it will automatically turn off the output voltage USB charging cable included, you can charge this battery at any USB supported devices