This is a remix of "Keychain LED Flashlight" by Berkenbusch. I just used his lid. I made this for my kids to share at school with their friends for Valentine's Day. I modeled this in Tinkercad. There are two STLs available. One has the word Jesus on it "Jeus is the light in my heart" and the other is plain.

Because the fit between the LED and battery is very snug, I used a little piece of black electrical tape to keep the light from being constantly on. Please see the pic for how to position. I had the longer LED's positive lead on top and the negative on the bottom. Make sure your battery matches. Also, the lid has a little bump inside. This should be positioned to line up with the LED +

It uses standard LEDs I purchased in bulk from Amazon from this link. https://www.amazon.com/gp/product/B07FKKN2TC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

And standard CR2032 batteries I purchased in bulk from this link. https://www.amazon.com/gp/product/B07J53WQ24/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Both models print fine without support using PLA on the Toybox printer. I've also tested on my Matterhackers Pulse XE with NylonG at .1mm resolution. The lid fit a little tighter, but thanks to the NylonG it survived me pushing it into place.

I also intend to use these in my STEAM class as a Tinkercad project, including a circuit and 3D printing.

Happy Valentine's Day!