If the MTH remote keeps shutting down a couple tight rubber bands holding the battery cover works well.
Sometimes you have to add something to the back of the cover also as the batteries tend to pop out
Dave Hikel had a near little thing he 3D printed a couple of York meets ago, it holds the batteries in place and doesn't push out the cover like foam on the cover does. Can't find the picture now...
Yeah the contacts are a smidge too low, batteries easily pop up.
Add a foam piece inside the battery cover.