OK I am new to this forum and did a search on the John Deere SST16 and did not come up with a whole lot so in order to get help I started a new thread. So here goes. I am having problems with my SST 16. The tractor will no longer maintain the charge on the battery while in use. I can have a full charged battery and maybe get two good whole yard mows out of it before the battery goes completely dead. This is aggravating. I have to keep hooking it up to a charger to re-charge the battery. It is not the battery for I have changed batteries a few times and in fact have a brand new one right now. Can anyone offer any help or suggestions on what to take a look at? It has not always done this so something some where has went wrong. Is there any simple connections or places to look for the problem? Any help will be greatly appreciated.