Originally Posted by
awac
I read somewhere that Mitotoyo have a patent on the battery system and that is why it lasts so long and others don’t.
The other name brand calipers all have similar battery life to the Mitutoyos. The cheap imports use cheaper batteries when new, and have substantially higher power consumption when turned off. There’s a write up online somewhere about what’s different in the circuit of the imports that makes it cheaper to produce but uses more power. The result is way shorter battery life. That’s actually the easiest way I’ve found to separate real digital Mitutoyo calipers from the massive number of fakes for sale.