It's bigger than I expected, and too big to mount on my sportbike.  I changed the ring connectors to a Deltran quick-connect, and I leave the unit plugged to the end of the extension cord in my garage.  For $25 plus $6 for the quick connect, this is about half the cost of a Battery Tender, but works just as well.  It would be nice if a Deltran connect was included with the unit.