Patent ID: 8120318

Claim:
A battery charger for two types of rectangular battery packs, the battery charger comprising: an outer case provided with a holding cavity that accepts, in a detachable fashion, a first rectangular battery pack and a second rectangular battery pack, the first and second rectangular battery packs having different external shapes and electrode terminals provided on respective perimeter terminal surfaces, the holding cavity has a rectangular opening with a first perimeter wall and second perimeter wall disposed in an adjacent, perpendicular fashion; first charging terminals to contact first rectangular battery pack electrode terminals, and second charging terminals to contact second rectangular battery pack electrode terminals, the first charging terminals and second charging terminals being provided on the first perimeter wall and second perimeter wall respectively, wherein the holding cavity has an inside shape that allows the electrode terminals to contact the first and second charging terminals when the first rectangular battery pack and the second rectangular battery pack are loaded with 90 degrees of rotation between the respective perimeter terminal surfaces, and the first rectangular battery pack is charged through the first charging terminals when loaded in the holding cavity with the first rectangular battery pack electrode terminals in contact with the first charging terminals, and the second rectangular battery pack is charged through the second charging terminals when loaded in the holding cavity with the second rectangular battery pack electrode terminals in contact with the second charging terminals.