I had a battery problem last year. Batteries were less than a year old and one of them had a problem. The terminals overheated, and melted thru an underseat tray that had some golfing vests and blankets. Burnt holes right thru 2 rarely used pullovers. Nice little 1" round holes directly above the terminals. Batteries were covered under warranty but my outfits weren't!
Lucky the cart didn't catch on fire!