We got a new battery from the shop- cheaper than the stock brand, which I was excited about. It was dusty, they said it'd been around a bit, but they had tested and charged it.
Lokky got around to putting it in a day or two ago, and he connected it and it would not start. The red engine light would come on, it would click and try to turn over, and then stop and put on the red engine light again.
We went to the shop and had them check the battery again. They verified it was properly charged. We explained the problem and they suggested we check the fuse, and ran through how to connect it properly with us.
So we took a new fuse home with us. Sure enough, the old fuse was cracked at one end, I assume from the thief. Lokky switched it for the new fuse, hooked up the battery properly like we were told, and then we tried to start her up.
With the new, unbroken fuse in she clicks and doesn't even try to turn over. Disheartening.

So we took the Stella up to the Lowe's and got a voltmeter. Testing the battery with the voltmeter, the battery initially showed a full charge sitting on its own, but when we hit the ignition and tried to start it, it dropped to 3-5 volts.
Doesn't that mean the battery is bad? Or is there something else going on here?