Rechargable Battery Pack Batteries for Nintendo Wii Controller NEW Recharge the battery pack via USB (simply connect to your Wii USB port to charge) USB charging cable included, LED indication during charging, Battery Capacity: 1800mAh Probably the most important and needed accessory for the Nintendo Wii is rechargeable batteries. If you play on a regular bases, you'll know that you go through batteries like no tomorrow. Unless of course you have rechargeable AA batteries. But even so, you have to take them out just to charge With the battery pack, you no longer have to remove any batteries from the controller. The battery pack is just a battery cover with two rechargeable batteries attached to it.