Great info.

I recently just got the Battery Tender Jr. (space saving) from Amazon for $22+ ($31.77 shipped since I got an extra quick-connect plug to use on another car)

Right now on Amazon the larger Battery Tender Plus (pictured above) is $42.23 shipped in case anyone is thinking about getting one. See link here - Battery Tender

Great price and recommended if you often store your car, just plug it in and forget it.