If some of you are having difficulty bringing a dead Optima battery back to life this might help you out. I had 4 Optimas that were only about 6 months old and 1 that was 4 years old. They were all victims of my own negligence, like leaving the interior light on for 3 months! They were stone cold dead. I tried to recharge them with a commercial charger and they would not take a charge, I tried trickle charging over a couple of days, I tried 20, 40, and 60 amp settings to no avail, I tried 200 amps for 2 hours to try and shock these things back to life but that didn't work. I took the batteries to a friends auto electric shop to test Optimas warranty policy and he put the batteries on a "line charger". The line charger will run up to 400 amps and pulses the current, they charge at that rate for a couple of hours, he slowly reduced the current all the way down to a 2 amp trickle and left them on it for a couple of days. The batteries are working just fine now. He said another way to bring a dead Optima back is to take a good fully charged battery and a pair of good battery cables and connect them "jumper" fashion, hook up a commercial battery charger to both of them and let it sit on high (60 amps) until the amperage rate starts to decline, then you can set a trickle charge on it to finish charging.
Cheers,
Mark
Cheers,
Mark
