Originally Posted by
rsbob
I can’t think of one bike computer that starts without hitting a button. Plenty of them have the auto start/stop feature, but it is after you press Start, of else there would be a perpetual drain on the battery, killing it much sooner.
My wired computer that is over 10 years old will run for years on one CR2032 coin type battery. Auto starts when the wheel sensor picks up the magnet that goes past.
They used to all be made this way. Mine is a Sports Instruments SI90, but that company went out of business over a decade ago. I used to have a couple Trek ones that did the same thing, but the Trek ones used a thinner wire that would snag and break. The Sports Instruments ones used better wire.