Ultra-compact Battery "Box"

I needed to get another power supply for my nodes for an upcoming event. I've got a yard trimmer that takes 20V Li-Ion batteries. Also, had an extra charger that was bad for those batteries (I've got a couple spare batteries), so decided to take my spare POE switch and one of the batteries to make a seperate battery box. All I did was harvest 2 contacts and the bottom half of the shell from the bad charger, checked the power pins with a DMM to double check polarity, and wire those to the power connector on the switch. This perticular switch had a couple spare pins next to the coaxial connector. The white plastic on there is Shapelock, which I used mostly as a glue to hold it together. 

First two links are to pics of the completed unit. 
https://drive.google.com/file/d/1-VrQClUTGlpCeNiXfHR3biCQTMGp65UX/view?u...
https://drive.google.com/file/d/1IUp7YajV6SBhgzXd_fUGCNixeJiLmg5Y/view?u...

This is the switch I used in this project:
https://www.aliexpress.com/item/32799832052.html