Adapting cell battery to HP 41

[mfleming]

(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.

I liked this quote from the description in the second link you've provided

"Unfortunately, the designers of the HP-41 didn't consider the usage of an USB cable to charge the calculator."

If they had, the designers would have been remarkably prescient!