Bad Battery???

What kind of problems are you having? What does the voltage run "in the car?" running at the battery?

Before I had it fixed, I wouldn't start period. The mechanic changed the starter relay and some bad wiring. They called and said it was ready. I went to pick it up and it wouldn't start. He got the charger with the start feature and it started right up. Took it home thinking battery may just be low, so driving it around May give it a charge. Shut it off and gave it a minute and it started up easily.
Over the weekend was busy, so didn't fire it up Saturday or Sunday. Monday morning completely dead, but when I hooked my truck up to it, it started right up. Didn't even need to wait a bit.

So it sounds like the battery, but that reads read over 12 when it is running.

Jason