I charged my cart for the first time since we bought it last week. The charger is a power wise with auto shut off. The batteries are NAPA 8144. When I lifted the seat I saw fluid at the back three batteries, mostly at the negative terminal. It was enough to drip in heavily onto my garage carpet and melt/burn it. It appears to be purple in color. I have no idea what do, did the previous owner overfill the batteries? The front three are OK.