Maintenance free and the heat here in Florida Beats up the battery. I had to replace mine in my 05 XUV 6 times. My old truck that sits most of the time has the pop top type that is 7yrs old. I just have to keep the water in it and charge it now and then. Some older batteries I found in the junk just needed water and a charge. It is nice to find one to use as a core or to scrap for a couple bucks.