Wiimote battery packs available for pre-order, shipped before end of February (in Japan)

Joystiq's resident 'man in a far-off land' recently checked out Japanese manufacturer Thanko for the skinny on rechargeable battery pack availability. He found that the company is taking pre-orders for their product starting today, promising delivery of said product before the end of February.

Each pack, which includes a lithium-ion battery and the USB stand (pictured), allows one to plug it into one of the available USB plugs on the back of the Wii. Not only that, but the company says that a three-and-a-half hour charge will keep players in the game for up to 25 hours.

Anyone plan on importing this?

[Via Joystiq]