Image Number 10 for United States Patent #8120318.
The battery charger is provided with a holding cavity 2 that allows a first rectangular battery pack 30 and a second rectangular battery pack 40 to be loaded in a detachable fashion. The holding cavity has a rectangular opening and has first charging terminals 5A to contact first rectangular battery pack electrode terminals 32, and second charging terminals 5B to contact second rectangular battery pack 40 electrode terminals 42 established on a first perimeter wall 4A and second perimeter wall 4B, which are perpendicular. The battery charger charges the first rectangular battery pack through the first charging terminals when it is loaded in the holding cavity with electrode terminals 32 in contact with the first charging terminals. The battery charger charges the second rectangular battery pack through the second charging terminals when it is loaded in the holding cavity with electrode terminals in contact with the second charging terminals.