I drained my battery using it to power a small electronic device for about an hour with the engine off. I called for roadside assistance. After they got it to start and run for a few minutes, they turned it off and did some tests. They said their tests indicated the battery had a bad cell and needed to be replaced. The car starts and runs fine now.
I took it to a big box retailer that does free test and install. Their quick hand held test said it tested good. They ran it again on a different machine that took over an hour to run and again said the battery is good.
Should I do additional testing or just keep driving and avoid draining it with my electronics?