I have a John Deere LA100 Lawn tractor. Bought it new in 2005 Worked good for two years, now every time I put in garage between cuts for a week or two the battery is dead. I have to jump it to get started. Now when running it is charging, running lights are fine when running. When not used for that short time something is draining the battery. Has anyone had this problem or know of a fix would be great. Someone said might be a Diode in the system.