Actually today my favorite truck accessories shop had a like new Optima Yellow Top sitting on the bench. I asked them why it was sitting there and they said it was damaged or something because the customers regular car battery charger (aka cheapy Schumacher charger) wouldn't seem to charge it up. I said, "perfect! I have just the thing". I hooked up the trusty G1100 and the "error!" light flashed orange which isn't good. I wasn't sure if the charger would still provide power in that state or not. I didn't have time to leave it hooked up to find out so I grabbed another new battery that I had on hand at the shop. I connected them both with some jumper cables in parallel. This presents a normal charge to the charger so that it operates normally, thus, charging the batteries.
