January 24, 2026
Description
These are lithium cell canisters that have grooved in the lid to accept an o-ring, greatly increasing water resistance. I recommend applying some silicone grease to the o-ring before installation.
The 21700 and 18650 versions are strictly for unprotected, flat top cells. The 14500 version will accept pretty much any AA or 14500 cell. I printed them using Overture PLA Plus.
They use the following o-ring sizes:
14500 - P14 (13.8mm ID, 18.6mm OD)
18650 - P18 (17.8mm ID, 22.6mm OD)
21700 - P20 (19.8mm ID, 24.6mm OD)
License:
Creative Commons — Attribution
Rabid Badger
