Kytok Rechargeable Batteries green: fully charged/standby. The cool lightning-shaped LED lights will show when the power stays on. Quad Protection with Chip Built-in smart chip provides comprehensive protection for charging station and rechargeable battery packs against overheating, short circuit, over-current, over-voltage, makes the Xbox One controller rechargeable battery and charger safe and reliable. Don't worry, even if the Xbox battery is plugged in all night, the charging dock will automatically stop charging when fully charged. Simple and convenient to use The Xbox Series S rechargeable battery fits all official Xbox One, Xbox Series X and Xbox Series S controllers. Simply plug Xbox Series X rechargeable battery into the battery charging station slots to start charging. Putting the battery into the xbox controller is also easy: the metal contact of the battery should be on the left side of the controller, then press the right side of the battery on the controller. Kytok.