Just finished changing the battery in the wife's quad....in Michigan at 12F. Battery would not come out of the battery box......one hour later with the wifes blow dryer it came out. There was a perfect 1/8" thick layer of mud and debris frozen on the battery housing. The drain holes were open. What I suspect is that after numerous mud bogging trip the box became filled with mud. Excess water drained out and the rest frozen around the battery.. Next fall the batteries with come out and boxes cleaned prior to old man winter arriving.

 

Tried taking mine out once just for heck of it but it was stuck good & this was summertime. Thankfully mine still doing good after 4 years.

 

same thing on the 800 and it was fall time and had to pry it out because of all the dried mud and crap in there. they are tight for sure.