I have a polaris 800 twin sportsman efi and its been having battery issues. i then switched the batterys out, and it lasted maybe a month and it had a problem, the battery isnt holding charge and dies after you ride it for 5 minutes. i changed the stator, and still have the same problem, the battery is swollen because we have charged it alot of times and this battery is only a month old. Could it be the voltage regulator? what should i do? i just want the damn thing to run.