gauvins

I've purchased rechargeable coin cells (ML2032). I hadn't realised at the time that they store only a third of what's in a CR2032 (65 vs 220mAh). So, on the one hand, rechargeable cells are good for the environment, perhaps good for the wallet as well (300 cycles as stated by the manufacturer'), and it more or less solves the "problem" of finding replacement cells at a reasonable price in a foreign town (shocking in some places). OTOH, it means 3 times the replacements, and carrying a charger (about the size of a thumb drive).

Based on experience and Garmin's data sheet -- on a Cr2032, speed/cadence/HRM sensors are supposed to be good for one year @ 1h/day. That would be 350 hours of autonomy. Switch to a ML and nominal autonomy falls to 100 hrs, or about 2 weeks on tour.

For a minute I thought I'd ditch rechargeable and go with standard cells, but finally decided that I'll stick to the plan. If someone else has converted to rechargeable, I'll read with interest.

IPassGas

Some years after using wireless speed sensors, I gave up, since the batteries have about a 1 year life. All I really care about is distance ... a wired sensor has a battery lifetime of >5 years. However, I often break the bike apart for travel, so I installed bullet connectors on that wire and the dynohub wire...easy to break apart without removing the sensor base from the handlebars.