Gold mount battery for cp16r spotted

[Max Flick]

I recently came across a Cinema Products Gismo on sale and saw that it had been outfitted with a custom Anton Bauer gold mount plate wired through the original CP16 NC-4 20v onboard battery. I messaged the seller about it and he said that an engineer at cbs did it for him back in the day and that he didn't know how it was done.
 

Anyone have any ideas? I thought posting it here and showing a photo that it's been done before might inspire a user to figure it out since I lack the knowledge on how to make my own batteries. It must have something converting the voltage from the 14.4v gold mounts to the 20v the cp16 requires. Would be a dream to get something like this made and solve so many issues I face with powering monitor and wireless systems as well as the now scarce original batteries that need to be user-made.

[Aapo Lettinen]

Would work if using 26v battery with down converter or 14.4v battery with boost converter. The cp16 battery adapter block either 3d printed or cnc made out of plastic.

These are possible to make but depends on how much they can cost. Boost converter is more expensive to arrange than down converter because in most cases a boost converter needs to be custom made from scratch whereas a down concerter is a off the shelf part