Hey guys,
A good friend of mine whom i owe a lot of favors cause i always ride on his land called me up today to say his sportsman just drained its 3rd battery in about 6 months. The first battery was old, like the original battery so that doesn't surprise me, i think its a 2002 model. Anyways, he put a new one on in winter, it drained out after about 2 months. Put a new one on in March, it drained out 2 weeks ago.

Anyways, he said as the battery was going out in winter, both times while the quad was running, it didn't even have enough power to raise and lower his plow.

Also, as a third note, he has some sort of a power jack the a sprayer plugs into.

Anyways, I guess what I am asking, is how can i tell what is drawing a charge? That...or is there some sort of a recharging system on his quad that probably went out and that is why the battery just drains and wont charge back up? How would I go about testing this?

Thanks for reading, I've never had an electrical problem on my 400ex, so I am really not good with this stuff but I figured I'd give it a try to help him out. Thanks!