Hi! I had some luck and won some Skil tools and batteries. Now when I have several good batteries I would also like to use them for a new small ev project too power a RC-motor. I plan to 3d print a holder and will there have +/- terminals that slides into those slots in the battery. Now when I messured the battery with a multimeter, I saw 19volts something for less than a second, then it goes away.. since there is a terminal in the middle named ”D” I assume that need to connect to something in a tool to activate the battery? When I compare to the old Makita to the left that have more terminals there I have a stabile voltage between plus and minus. Also on Ryobi One battery I have 18v between plus and minus, those also have a third named ”T”, probably tempsensor, seem to work without. I really want to use my new skil batteries becase they package better in a holder for my application. Any tips How I should fool the ”D”?