Power being drained somewhere

Good afternoon forums,

Haven’t ridden in about 6 weeks (I know, travesty!!!), and when I went to start it up the battery was dead. Bought a new battery this May, so don’t think that is the problem.

I boosted it, ran the Quad for about 10 minutes and turned it off after getting it all loaded up to go out. Checked it again to see if it would start, wouldn’t go.

Boosted it again, let it run and went inside to eat. Came back out about 40 minutes later, and the Quad was off and wouldn’t start. Engine was cool, so I don’t think it ran for more than 15-20 minutes or so.

Winch is hooked up directly to the battery (not through ignition), and has a wireless switch if I turn it on. Nothing else has been changed on wiring though.

Alternator? Power drain somewhere?