I've had my Predator for 3 years and have put like 5 batteries in it. I keep it on a "battery tender". It starts fine then at random times the bike just dies. The batteries seem fried. Won't take a charge, will just hold a surface charge as soon as you hit the starter it zaps them down to nothing. My last battery did ok it lasted maybe a year before it quit. Bike charges at 14 volts which seems about right to me. I tried changing the rectifier and thought I had it fixed but I killed another battery this weekend. Maybe I have had a bad string of batteries.