Wii controllers are a great way to play to your games, but they can really eat through a set of batteries after a few hours of game play. Thankfully, you can buy some spare rechargeable battery and pop them into a handy Wii charger. The best Wii chargers will never overcharge your batteries, so you can safely leave them in the charging unit until they are needed. Wii chargers are available for both the standard controller and for the steering wheel controller. You can find chargers with slots for as many controllers as you own. Have a look at what's available.