UPDATE: see why the cheap ones kill batteries https://www.youtube.com/watch?v=E8oopG2GpF0 Boltr: calipers. How bad can ten dollar digital calipers be? Take an insider's look at the differences between cheap Chinese calipers and high quality Japanese ones. Sparkfun's Hung Lo brand versus Mitutoyo versus your wallet. These are the bargain basement calipers that Harbor Freight, Princess Auto, KBC, Sears, Home Depot, Lowes, Canadian Tire are selling. Do they hit the "minimum viable tooling" requirements? Is it actually cheaper to buy quality tools? I'll also give you a few tips on how to improve the quality of cheap calipers. reddit link CLICK IT PLEASE, SOMETHING MAGICAL WILL HAPPEN! http://www.reddit.com/r/EngineeringPorn/comments/2tkh1w/digital_caliper_guts_the_cheap_kind/ I did a follow up on the battery consumption. It's shockingly bad! http://www.youtube.com/watch?v=E8oopG2GpF0 And another follow up on temperature compensation. Equally terrible. http://www.youtube.com/watch?v=NDhRqhA_SiQ