https://youtu.be/mBKZvAAp-tk?t=13Surprise, surprise! Mitts ship with an SR44, whadya know. A $150.00 genuine Mit doesn't save 20 cents by including a terrible battery. (Apparently the $75.00 knockoffs do, lol). This has more to do with the difference in battery life than anything else.
Tooki, this guy has some tool love for iGauging. And if you like battery life, there's an iGauging that takes a CR2032!
Here's a vid from him which you might find of interest.
https://youtu.be/1yqZx_FNbSs?t=144Timestamped at a point where he shows a potential source of error with the cheapos.
(Interestingly enough, I did this exact test with all 3 of my $10.00 calipers, and my set of feeler gauges. They measure exactly the same using the entire jaw or just the tips. Every one, down to the half mil, except for one of them. In fact, I have to carefully twist the feeler gauge to exactly perpendicular when measuring at the very tip in order to find the lowest reading, otherwise I can get a reading that is 2-3 mils
too high due to being slightly out of square. The lowest reading I could get was invariably either exactly the same as the full jaw reading except in one of the calipers, with some of the shims, the lowest reading I could get was half a mil
higher than the full jaw reading.
Only when I clamp down on the thumbwheel unreasonably hard can get the reading to drop below the right number, up to 2-3 mils low with enough force.
No daylight or misasligment on the inside jaws on any of mine, neither.
All of these observations pertain to even first pair that is maybe 10 years old. I was most worried about my newest one, TBH. It has noticeably more twisting slop, if you torque the jaws. But it gives the right reading, just like the others. I guess it's just a bit of a crapshoot, but for $10.00....