If the caps pop off, it is wet, a good idea to check monthly if you use it a lot. Otherwise a close inspection of posts, rust, water, connection tightness etc minimum 6 months. It is a lot easier than having to troubleshoot and fix problems later. Be sure the posts are coated with battery post corrosion preventer. Also check for a good clean ground connection at the frame, rust there can cause all kinds of problems that are difficult to figure out while on the road.
|