Extra thin 18650 TPU holder / sleeve for short circuit protection in your pocket

thingiverse

I'm rewriting the text with a new spin. Simple TPU condom-like sleeve best printed in flexible material to transport spare lithium ions in your pocket, avoiding short circuits. Should fit tightly if printed flexibly. Printing upside-down is recommended. I reworked the double design (file ending on 3) to fit slightly looser since the single version from the first print with Amazon Basics TPU sat a bit too tight. Number 4 features a larger handle for attaching it to a keychain or using as a lever to pull out batteries more easily. After almost six months of use, two of them work perfectly.