Over the years I've owned multiple bike computers (whose things that tell your speed/distance). Each time the head either falls off while I'm riding or I remove it, but lose it somewhere.
I want my next purchase to be one that is permanently affixed to my handlebars so that it never falls off or gets lost. I'm looking for one with strong mounting mechanism. I want to have to get out a screwdriver to replace the battery. I can't seem to find any one on the market that does this. Any help?