[Leica] My last aftermarket battery just died

[red735i at verizon.net (Frank Filippone)]

I have 12 batteries awaiting toxic waste pickup day.....

I will hold onto them until I hear back.... Unless my Wife finds them
first.....

Frank Filippone
Red735i at verizon.net

I'm looking for a solution to repair Leica M-8 & 9 batteries.
I succeeded, more than once,  with cellphones and walky-talkies.
I even made batteries for my Hasselblad 500ELM without changing anything
inside the camera and for some professional flashes (Metz, Honeywell and
Rolleigh), And you can't see the difference if you don't know it.
Somebody on this site said he had opened an M-9 battery. I asked for
pictures, I would be glad to know more to find a solution.
In the meanwhile keep your dead batteries, I don't promise anything, but you
never know. It took me 6 months to find the solution for the 500ELM and
another 6 months if not a year to make tests.

Regards

Cedric