Why do so many reviewers complain about caliper battery life?

Community threads repeatedly note that many budget calipers only shut off the display while the sensor keeps draining, and that using LR44 alkaline cells instead of SR44/357 silver-oxide batteries makes it worse. Reviewers say genuine auto-off (as on Mitutoyo) or rechargeable designs solve most of the complaint, but it remains the most common pain point across the category.