Several digital calipers are in need of a new battery. Any of these around the 'Space that can be ‘liberated’ for this purpose?
Best option when new ones come in is to glue the case shut so it doesn’t fall off. Most seem to disappear before the battery dies.
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Is this because the covers fall off setting the battery free or are the batteries being taken? Gluing the cover makes the tool disposable, but they do not cost that much more than the battery when bought from Horror Freight.
My initial reaction seeing the title is wonder: how can a button battery put out 357 amps?
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It seems we have lots of calipers without covers so the batteries fall out and the calipers then become worthless. I don’t know why, but it is general observation made by a lot of folks. If gluing them on and they last 8-10 weeks, then they are lasting longer than normal before disappearing or thrown away.
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This made me shake my head…
Sad, but true. It is amazing how many of these have and continue to be purchased on a recurring basis. It they are being thrown away, they are are being taken.
They are more or less are disposable in a makerspace setting. I would order these by the dozen and they would last a few months.
https://www.amazon.com/Neiko-01407A-Electronic-Digital-Stainless/dp/B000GSLKIW/
Sure, they could last a long time if one person was using them and took care of them but history has shown that isn’t how it goes.
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Those are way more expensive than what we are buying now. But don’t go too cheap, or they only go out to 0.01" … not millimeters. Right @nicksilva
Yeah. Whatever we do, do not buy expensive micrometers.
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I know what you’re saying is true, but it made me shake my head that a caliper, with numbers engraved on it and all, was “worthless” because a battery wasn’t in it…Digital kids, man; digital kids…
(and yes, I am “one of those”: incapable of reading a sliderule or doing math in my head, but geez louise!).
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Reading the numbers off a digital caliper may be good enough for say most wooding where 1/32" (.032") or even a 1/64th (.016") is acceptable but for anything with accuracy in maching, a Startett 6" scale is probably better.
Nobody’s using these for “precision machining” anyway (whether they think they are or not). A battery changes that not one iota.
Anyway. Still makes me shake my head.
All I wanted was a battery, now i can’t get any more email notifications today from stupid Discourse 
Most digital calipers, even inexpensive ones, certify ± .001" when sent to calibration labs. As long as they are above the minimum required voltage to turn they can “count” the digital input/marks. May impact screen readout brightness.
Most error in calipers is due to operator variance: not holding faces square and mainly amount of pressure applied. I plan on doing an inspection tool class at some point, doing quick R&R studies to show intra/inter operator variance.
Some don’t even have batteries in them. The ones we recently bought didn’t have them included.
None of my personal ones have batteries in them. But that comes with them all being dial calipers.
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So no one else was amazed that a button cell could be capable of 357 Amps? Be real careful with it; it could easily weld itself to your wedding ring turing your ring into a space heater.
Late to the game. See the third reply. Though I know I had that initial thought as well, the mundane import topic sort of killed the interest in making the comment.