The display on Mary’s Cateye Astrale “Cyclocomputer” had once again faded to gray, so it’s time for a new CR2032 lithium cell:

The old cell read 2.5 V, well below what it should be.
The notes scrawled on the cell become readable under better light:

Seven years (at 1942 mile/yr) ain’t bad at all!
To replace the cell fast enough to maintain the odometer reading, just unscrew & remove the battery cover, slam the back of the Astrale on the bench, and pop in the new cell.
Maybe I should replace the cell twice a decade, regardless of how feeble it might be?