WantMall 2x USB Rechargeable Play Charge Cable Battery Charger Kit for Xbox ONE Specially designed rechargeable battery pack for XBOX ONE controller Long using life --- the built in NI-MH battery can recycle over 500 times Easy to use --- just connect the battery pack with the USB power cable to the XBOX ONE The power indicator will light up red whilst charging and the light will go off once it is fully charged Dual function, play and charge at the same time