2170 (21700) SMD Cell Holder

thingiverse

This is a 2170/21700 Li-Ion battery holder based on the dimensions of the Keystone 1042 18650 holder. The proportions are just scaled up to fit a 2170 cell and seems to work fairly well in my testing. You will need a 1042 cell holder to extract the metal springs from, and insert those springs into the 3D printed 2170 holder. You may need to heat the spring clips a bit with a soldering iron to soften the plastic when inserting them if they are giving you trouble.