eXpansys offers the Mad Catz Rechargeable Battery Pack for Nintendo Wii Fit
, model no. MOV057720, for $3.99
with free shipping
. That's $2 under our September mention and the lowest total price we could find by $8. Designed for use with the Wii Fit (sold separately), this charger features a 750mAh rechargeable battery pack, USB recharging cable, and more.