Thank you for viewing. This is a listing for a genuine Nintendo Wii U GamePad Battery Pack (2550mAh). I purchased it at an electronics store, but I have no use for it since I switched to the Nintendo Switch, so it has become unnecessary. It is completely new and unopened. The difference from the standard Wii U GamePad battery is as follows: Wii U GamePad Battery Pack (2550mAh) Approximately 5-8 hours Battery Pack (1500mAh) Standard with Wii U GamePad Approximately 3-5 hours Set Contents Wii U GamePad Battery Pack (2550mAh) [WUP-013] 1 piece Phillips screwdriver (size 0) 1 Instruction manual It seems that the tools necessary for installation are also included. Since it is quite old, I cannot guarantee perfect operation, but please consider it if you understand that it is a new, unopened item. Thank you very much.