I had 3 completely dead 12v solar AMD batteries on my trailer. They were depleted down to 2v and I thought I would have to replace them. I trjump starting them 3 times with my car for 20 minutes each time but could only get them to 5v. I purchased this charger and used the repair mode. It took a few tries, but I managed to get the batteries to start taking a charge. I had to leave
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