17 sportsman 570 with 54 miles, led tails and headlights. I've owned it since 22 miles and it came with z battery tender so im going to assume the original owner kept it on a tender like i do.
Anyway I finally got to plow with it this weekend and seems slow cranking, sometimes when pulling the plow up with the winch it dies. Most of the time it will start right back up but a couple times it just clicked. It did start after waiting a minute though. I'm not using my headlights when plowing either.
I wouldn't think this battery was that much of a pos. Or maybe it is. At least I got to take the sled for a rip before the streets were plowed

 

Check the charging rate while at an idle. If it's charging ok,do a load test on the battery. Could be time to replace it. Yuasa batteries for the most part are good batteries and most atvs come standard with them.

 

Sometimes new batteries are just junk, it happens. As many batteries as are manufactured every year, its inevitable that a few duds will find their way into new atvs.

 

I think my
last one I ordered was a Big Crank from Batterymart.com