Compatible with Xbox One and Xbox X,S controllers and all OtterBox gaming products; includes TWO BATTERIESEach battery delivers up to 10+ hours of untethered playtime; Continuous power eliminates need to resync; reserve energy cell sustains controller power while you swap; low battery alert illuminates’ hands, always know when you’re running lowDock charges two batteries simultaneously; able to charge individual batteries via USB-C cable; backup battery always ready; LEDs display charging status and battery lifeOptimized for natural controller balance; proven durability withstands the test of timeLimited lifetime warranty supported by hassle-free customer service