My trusty Makita 8391D drill decided to divorce its Ni-Cd batteries.

So i modeled an adapter to accept Parkside Team X20v tool batteries.
Had to print cross-sections of slide to fit it properly as tolerances were missed by a mile if printed as modeled. (EDIT1: STL is already adjusted for printing.)

For contact pins i reused contact plates from dead ni-cd battery. Used a superheated 9mm utility knife blade to make holes as it is perfectly sized for recovered battery plates. Also keeps shmoo off plates for easier no-clean soldering later.

This is only base slide, can be adapted to variety of other tools than Makita, you only need to figure out mounting. In my case it was a piece of wood i just hacked out on a bandsaw and screwed it in a hole in a tool.
I also made it so it can be disconnected, reused some spade crimped cables i found in my maker-pile. Female spades fit nicely over original prongs in the drill, so if i ever fancy to take it to other tool with similar connection i can.

Used CTC Ebay Special printer to knock it out at 0.3 layers, because i'm impatient, printed in Ebay Special PLA. Bit ugly, but couldnt be bothered with chamfers and other beauty things. Functionality beats aesthetics in my book.

Modeled in sketchup. Damn sketchup is weird, coming from 3dsmax/autocad (cant afford either...).

Hope it helps someone who has some nice Lidl bought tools. I had some so figured why not adapt to their batteries...