I have an exmark laser with a 1 year old motor. Battery keeps going dead. I put a new battery on yesterday and it did fine. Today it has started doing the same thing. The battery is not charging I assume? I shut it off to talk to my customer and would not restart. I jumped it and started and ran fine for a bit then just died like I was out of gas. Jumped it again... started fine. Any suggestions? I'm thinking maybe the stater? Is there anything else it could be? Any help would be great.