Wing nuts are fine for a battery that is Uninstalled on a regular basis. As in, you take it home when you aren't in the boat. But batteries that are permanently installed should have regular nuts that are torqued to the right specification. A proper maintenence schedule of the batteries should include slightly loosening and re-torquing the nuts once a month. However, this paper days to re-torque when the terminal resistance gets to high. Http://www.battcon.com/papersfinal2015/4%20Tressler%20Paper%202015.pdf This re-torquing is why I prefer split lock washers inserted before the nut more than self locking nuts because the nylon inserts tend to reduce their holding power after a few times of being worked back and forth. The battery manufacture should have in their installation instructions the torque specification. Once torqued correctly, you want to apply a no-ox grease. That spray on stuff from the auto store will work fine if you are inland, but boats in the salt environment should get a heavy no-ox that you apply with a brush. JamesS/V Kristy 1971 C&C 39
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