I am working on a Yamaha G22E electric golf cart. The batteries were so dead I had to give them a boost before it would charge. The battery charger was showing abnormal cycle error a couple of times. It did start to charge finally and came up to 48 volts. The charger never did say they were done. I could hear the batteries bubbling. When I turned on the key I got the alarm sound and when I pushing the throttle peddle it started to move a couple of inches and stopped. It almost seemed like the brake was on.