Black & Decker EPC12 Pin Holder

Thanks to Japim who was kind enough to send me the CAD files and provide inspiration.
You should check his thing too
https://www.thingiverse.com/thing:2767560
My initial idea was to design and print the whole battery case for 18650 batteries.However the original battery can (now) only power the drill for about 2 minutes ,so i thought it would be better to just make a conversion(remove the old batteries and add 18650 in the original case).If it works well i am going to design the whole case in