Check out this new Wiimote charger that supposedly uses lighter lithium polymer batteries coupled with contactless re-charging.
Teknocreations has unveiled their InCharge battery pack and charge stand for Wiimotes. The new stand uses a set of lithium polymer batteries, which, according to the press release, are half as heavy as other rechargeables and work over hundreds of charges. Each charge provides 25 hours of gameplay. The stand can charge two Wiimotes side-by-side.