Magnetic 18650 battery holder

I tried this holder - https://www.thingiverse.com/thing:1188235 but it did not actually fit the 18650's, it was to short

The design was simple enough that i just went to tinker cad and made a new file.

This requires eight total 2 x 6 mm magnets for closing strength. i used this brand (https://smile.amazon.com/gp/product/B075RZ82HP/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1) but of course and 2 x 6 magnets you like will work.