this little retrofit uses https://www.amazon.com/dp/B0CS6Q62BQ?ref=ppx_yo2ov_dt_b_fed_asin_title rechargeable flashlight. as you can see it works well. It glues into the mysterious slit in the pages stl. allows easy access to the switch and charge port. It gives the overall model a finished look.
The author remixed this model.
I grew weary of of the “ whatever I had laying around” response from the author and decided to take 5 minutes out of my day a design this.