Smatree Rechargeable Battery 3 Packs with Dual Charging Station High Speed Docking Compatible for Xbox One/Xbox One X/Xbox One S/ Xbox One Elite Wireless Controller Longer lifetime: 2000mAh high capacity rechargeable battery for longer game playing, say goodbye to AA battery, more saving money and more convenience for charging More Compatibility: Smatree rechargeable battery with charging dock can fit for Xbox One/Xbox One S/Xbox One X/Xbox One Elite Wireless Controller Easy to use: Put the Xbox One controller in the charging dock, it begins charging automatically without needing to remove the battery from the controller when no gaming Intelligent Detect Function:This charging station is built in smart current detect function. If RED led indicator twinkles constantly, please check whether battery is installed correctly or not. BATTERY DESIGN PATENT IN PENDING!