I took an absolutely different direction. Until a couple years ago the only battery tools I had were the old 9.6 long handle Makita. I ended up with a couple of Makita LXT 18V, not saying they are better or worse. THEN I discovered the relatively cheap and not always well made adapters on egag. AND the battery bases. I've collected a number of tools CHEAP from the thrift stores and either adapted or converted them to use Makita.
Since these adaptations do not communicate between battery and tool, and since Li-ion are more finicky, you must be careful not to run them down too far.
Prolly the best story, lol, is I bought a 19.2V Craftsman sawzall from St Vinny's --converted it to Makita, and then ended up dragging it BACK over there to saw down a 2 1/2" water pipe mast to buy their old VHF two way antenna.
Some of these tools I've nearly stolen. Bought a Metabo nice little drill, just like new. No battery or charger for TWO dollars. Cut down the base, mounted a Makita mount on it, and made a great drill
Likewise I've got about 5 of the little Royobi 5" (?) circular saws. Hell you can't buy the BLADES for that!!!. One I converted, but I also have a plug in adapter. I've got two Bosch 6 - 6 1/2" and I scored two Rigid, I think, 7 1/4 saws for 5 bucks each on sale. They were ugly to adapt because of the OEM battery mounts, but they do work.
AND I converted the older, lightweight Makita 9.6V angle head drill to LXT 18V!!! It works just great!!!
I acquired a number of Craftsman 19.2V tools CHEAP. the angle drill is adapted, the angle grinder I use a plug in adapter
The adapted 9.6V to 18V. I used a battery out of "something else", inserted into the shortened handle, to form a base, mounted the Makita base to that. Works fine Does not seem to mind the nearly double voltage because of the variable speed control. One of the Makita bases for show
The little Metabo converted drill. I use this a lot. Small and light. Paid 2 bucks for it
I think I paid 75--80 for this new on ebay, no battery or charger. I use an adapter. This does the pinch clamps for pex piping, and turned out to be a life safer at my age
Forget, I paid 6-8 bucks for this Milwaukee bore scope, paid about 12 for an adapter off ebay. 12V tool, 18V Makita batt
Stapler I bought new, forget the price, 35? Makita battery adapter
A ryobi stapler I paid too much for (14.00) and it's twin in Craftsman clothes for really cheap. The Ryobi was missing the magazine and I didn't realize it, so as long as that mag works, I can use it in either tool
A Craftsman cut-in tool, uses dremel size shaft. I bought a HF arbor and tiny saws, and the smallest one works PERFECT for cutting pex clamps for removal
I thought these were Rigid, they are Skil. Got two for 5 bucks each. They are full size 7 1/4" is their advantage. I did a "quick and dirty" **** looking conversion to Makita 18V. I don't believe adapters are made