Voltage regulator

This is aku voltage regulator!

I've spent a lot of time on this project, even if it doesn't seem like. There was a lot of troubleshooting have to be done. It's pretty tight fit. 

I ordered a lot of things from aliexpress, except nuts,bolts and cables, where I tried to find cheapest and what I like.

For some changes, just DM.
Accu adapter

Specs
Efficiency is 90%
Max Input = 30V
Max Output = 30V

Used max input = 20V
Used max output = 18V

For a short period of time up to 20A, but in real life 15A.
 

What you will need
DC-DC Buck Converter (link)
3pin switch 15x21mm (link)
DC V-meter and A-metr (link)
female banana plug (link)
100K potenciometr (link)
8x M3 10mm (link)
8x M3 nuts (link)
DC for acer laptop (link)
Hecht battery 1246 (used for accu drill)

Printing
Layer height: 0.2 for better quality, 0.25 for faster print
Perimeters: 3
Infill: 10%
Support: none
Material: PLA or PETG for durability - I used PETG

In the body, there should be 1 pause print for M3 nuts, but it is tight - no need

You should print upper body as it is. I didn't need to use support + it looks much better with that lowe body. 
If you will print it with “display” on plate, might be a little loose.
 

What will be added
Parkside adapter for this model