Adapting cell battery to HP 41

[Artur - Brasil]

(01-10-2020 04:40 AM)Craig Bladow Wrote:  I found 3D printed designs for the HP-41C battery case here: https://www.thingiverse.com/thing:123278
They look similar to the design mentioned here: http://www.askrprojects.net/hardware/hp41bat/index.html
Note that the design file download links from the second website didn't work for me.

Very professional! The second link is what I've done using two individual boards. He did put in only one board the charger and the voltage step-up. Very nice!

Thanks
Artur