No additional charger is needed to recharge the battery. Just plug it into station. Blue Light indicating the battery is fully charged. Battery?s built-in cover replaces the original remote control cover. Package include: Two rechargable batteries Pack, One dual Docking Station for Wii Remote, One USB Adapter for docking station. Replace your Nintendo Wii remote controller battery with this rechargeable battery kit. Now, you will never run out of battery power. Simply recharge controller by resting the remote into the station. When blue light shed, you know it is ready for the next round!