XFUNY 2000mAh External Power Bank &ndash; Portable Charging Station Rechargeable Battery Pack for PlayStation 4 PS4 Controller Ergonomic Design will keep your hand comfortable when long time use, once attached no need remove it frequently, it would not interrupt you playing game. Secure locking mechanism to ensure the battery pack does not move during playing. Energy saving: when the power bar is in the standby mode, the output will turn off automatically which achieves the goal of energy-saving. Power detecting: When the power bank is in the standby mode, it can detect the power situation of the PS4 controller which makes you know the power situation of PS4 better. LED Power indicator is meaning the battery capacity and the LED indicator will light steadily during charging.