Teknocreations’ InCharge charging system charges wiimotes without opening the battery cover. Let me emphasize that again: it charges the wiimote through the battery cover AND the wiimote jacket. Well, hallelujah!
Swapping batteries on a dressed up wiimote, and frequently mind you, is an exercise in pure frustration (absolute evil, don’t try it at home, kids). By the time the batteries are replaced, one has an irresistable urge to chuck it at the TV and cackle like a madman which, pretty much, defeats the purpose of the grip cover.
Now, all you’ve got to do is put it in the cradle, so very gently, and let the power flow into the lithium polymer battery pack. Kinda like an electric toothbrush.