Join Date: Sep 2005
Thanked 228 Times in 170 Posts
ATV: 2013 550 XT
The PC680 is kind of like a deep cycle and AGM hybrid. It can take heavy loads and last longer. THat's all I run in my quads now.
BUT, even with the PC680, you will drain it quicker by winching a stuck quad at idle than if you were to rev the machine a bit. Remember, your charging system is 25amps, but that's when it's revving...not at idle. Not sure what it's rated for at idle, but my guess is not even half that. Total guess though.
Winches draw more amperage under load too, so if you have a winch under load while your ATV is idling, you're likely drawing almost 3 times more than what your charging system is putting out...that'll zap a battery in no time.
If it were me, before I buy a new battery to replace one I just got, I would try revving the machine a bit (don't need to redline the thing...just rev it a little bit) while you winch and see if that doesn't cure your woes.