The initial prototypes were done with adhesive copper tape. In order to do something prodessional, we will have to design something with a flexible PC, which we have created and asent to our PCB factory in China. Let's see what the price is, before deciding to go for it.
Herer are some more pictures of the prototypes:
If the process goes well enough, the following should be the battery for HP printers, HP)2/97, tape reader, etc.They will use the same principle, with a different design, of course