Digital caliper battery mod

We all hate the coin cells used in cheap calipers. They are outdated and always run out when you need them the most. The problem is not with the batteries but the calipers themselves as they only turn the screen off when the OFF button is pressed so a normal switch would also solve the problem but why not take it a step above and solve the problem of changing batteries once and for all.

I'm using a voltage divider to drop the voltage from 3.7v to 1.5v assuming the current consumption is very less would love to know if there is a better way than this.

instruction
1. Print all the parts and prepare the caliper. There is a template that you can print to make
a hole for the threaded inserts.
2. place the threaded inserts make sure you don't go through all the way.
you also have to make a small slot for the wires (refer to the image).
3. open the caliper and solder 2 wires to +ve and -Ve terminal, route the two wires out and
close the caliper.
4. Put the slider sw