The worse thing about digital calipers are those stupid-small batteries that don’t last 5 minutes and don’t stay in too well. Sometimes you lose the battery cover then you’re really screwed. To find a workable solution to this issue, I googles and saw a bunch of 3D printed solutions for data cables on these calipers. I decided that I didn’t care much for the data part, but to 3D print a connector just for this seemed a waste of time. Sure, you can find some Dupont connectors to 3D print, but is it worth it? I set about a different way.
I happen to have a large number of servo connector cables from my quadcopters days. It just so happens that one of these female 3-pin dupont connectors fit perfectly in the caliper’s data slot. And if you used male wires, bent them backwards and shoved them in the data connector slot, it holds tight and provides a great connection for the power rails.
First, get a stabby thing and take the dupont connectors off some single-wire connectors (red and black are a good choice for colors).
Take out all 3 female connectors form a servo cable and shove the male wires on the two ends of the servo connector as shown. Next you want to be careful and bend the male wires around the edge. You have to make sure your orientation is correct for the pins as they need to line up red with the (+) terminal and black with the Gnd otherwise you’ll be making a new cable—ask me how I know… I did this in 2 stages since the pins are fragile. I slowly bent them against a tabletop to 90 degrees. Assessed their quality and angles and bent the remaining excess to 180 degrees
When done you should have something that looks like this:
Plug it into the data port and you should have good connectivity with the power rails. It is a tight interference fit. 
I’ve considered adding this to a AAA or AAAA battery pack I could mount on top or the back of the calipers. I’m pretty busy so that might not happen. If it does, I’ll post my janky design here though.