18650 / 21700 battery flex keychain holster

thingiverse

As I usually carry with me some 18650 batteries (and I don't want any accidental shortcircuits), I designed a keychain holster for them. Print in flex material like ninjaflex or filaflex. Some day I was given one comercial silicone version of this as a gift, but as this is a very simple design (less than 10 minutes) I did my own. Wasn't sure if my printer could handle this flex height without support, but IT DID! (a bit tricky, remember that the print tends to be bent by the hotend while printing, so use low speed like 15mm/s) No support required, bridging should be ok with minor postprocessing. Pic is for a black ninjaflex build, holds the batts pretty good. Enjoy! HINT: You can Z-scale up it a bit for some longer batts, or XY-scale up a bit for thicker batts. The STL is for a regular unprotected, flat top batt but can hold others due to elasticity. TODO: Maybe a customizable version to allow for different kinds of batteries and/or multiple number of batteries. We'll see... UPDATE (25-JAN-2019): Added a model for a 21700 battery. UPDATE (02-NOV-2017):New model uploaded. I had fixed some flaws a time ago and guess I forgot to upload. I am sorry, too many projects on my mind... I don't know what actually happened. Anyway, fixed now. UPDATE (21-JUL-2017):Reduced insertion hole to increase battery protection. Pic and stl for the previous version removed. Pending pics for the new design builds, as soon as some of my flex capable machines becomes available. Posted a 2X version just for fun ;-) UPDATE (20-JUL-2017): Increased wall thickness for a more durable object and easier print. Don't ask...