Theo&Cleo 4 x 3600mAh Rechargeable Battery Pack For Xbox 360 Wireless Controller Keep your Microsoft xBox 360 controller charged-up so you are always ready to strike the winning point Make sure you don't run out of battery before your big win by keep in an en extra, rechargeable Ni-MH battery on hand Best replacement for the original battery with comparable standby and talk time. Great bargain with excellent quality guaranteed Color: Black Power: 3600mAH