Have a 2003 Yahama Kodiak 400 with a Warn wench.  The battery keeps going down to where the electric start will no longer work.  It just buzzes so I have to use the pull start.  This is both painful and annoying at 5:30 am before a hunt.  I've been through 2 batteries and several re-charges.  Now I just disconnect the battery when I'm not using it and it seems to hold the charge ok.  Could it be the wench draining the battery?  My brother has the exact same machine with a wench and he has never had a problem.  Any other advise?