CBK &reg; 3600mAh 3.7V WUP-010 Rechargeable Extended Battery Pack For Nintendo Wii U Gamepad + Screwdriver Voltage: 3.7V Capacity: 3600mAh Condition: Brand New Replacement Product, works as Genuine parts, 100% OEM Compatible!! Compatible Models: Nintendo Wii U Gamepad Package Included:1 x Battery 1 x Free Screwdriver