HP Forums

https://hackaday.com/2021/05/15/vintage-...-charging/

Also higher capacity batteries.


The click through to the original article is: https://partsbox.com/blog/wireless-charg...-2021.html


Pauli

There is also additional information from the author in this forum post.
https://www.hpmuseum.org/forum/thread-16924.html

I also see a Gizmodo article on this project.
https://gizmodo.com/adding-wireless-char...1846909664