Alex, no doubt, you and everyone else overlooked the obvious... don't go to the library! Works for me!

You can go to any of the fast food type of auto parts stores and they will bring their testing equipment right out to your car and do a bonafide load test on the battery. A volt meter will only give a you an idea if there is voltage present, and your radio and other low load gizmos have no problem operating on a goonie battery.....under a real load....things change.

Ernie