Just want other opinions about battery testing. I've got a cheap battery (warranteed for 2 years and is almost 2 years old in age) in a ' 92 Corolla and on some of the cold mornings now, the car almost didn't turn over on the first try (not normal) but did on second try. My wife and I concluded it was most likely the battery. Of course when I took it to Autozone, they said it tested ok (so no trade in value for it) but I decided to replace it since it was near end of its life and it was getting into winter weather. Last time I suspected battery with similar symptons, I was right. The only other thought now is if it's not battery, maybe the starter. Sympton was one first try, when you turn the key, no engine sound but on second try, all is normal. This happened so far maybe 3 times this week (this week was our first cold mornings about 45 degrees F ) and car sitting for about 11 hours outside. Car is otherwise in very good shape and very dependable. I'm looking forward to this week in the morning to see if all is well or not.
How reliable have you found these auto part stores battery tests?