Originally Posted by
Iride01
You must mean inexpensive wireless bike computers. My wireless bike computers have never needed battery replacement. And the sensors at most go at least 2 years and more with no need to replace their batteries. Except my PM I got a couple years ago did need a battery replacement at 1 year and that is the particular thing I experienced the issue with the bad Duracell CR2032's and had to replace it several times till I realized the entire blister pack of batteries all had too little voltage remaining in them.
They were pricy ones on a clearance price when I bought them over a decade ago. The age might have something to do with it, older electronics often were designed with more power hungry components. The display does show some text even when they are in sleep mode, wasting some power.