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A comment on Everything with a battery should have an off switch. Parent comment

Re:Everything with a battery should have an off switch by Tempest1981 on Monday May 09, 2022 @10:21AM (#31314327)
My $20 "Pittsburgh" calipers from Harbor Freight (don't judge) are still on their original batteries, after 6 years. They have a power button, and a separate zero button.
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Re:Everything with a battery should have an off switch by felixhandte on Monday May 09, 2022 @12:20PM (#31316077)
They don't actually turn off though. It just turns the display off. They need to continuously sense position since digital calipers measure movement increments rather than absolute position. That's why if you take the battery out and put it back in it will prompt you to re-zero the calipers.

Amusing video explanation: https://www.youtube.com/watch?v=KnDype-j3hk

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Re:Everything with a battery should have an off switch by maxerickson on Monday May 09, 2022 @12:45PM (#31316448)
It's not uncommon for them to be designed to require zeroing at each power on.
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