2x18650 battery case with power switch and balance connector

thingiverse

This case comes in several different versions. The one used here includes a kcd5-101 rocker switch, a PHU-03 connector, 26 AWG wires for the charging port, and 20 AWG wires for the power connection. It can be paired with either a 40mm belt or two pieces of 20mm velcro. However, due to the low quality ABS used in the printing process, some filing and sanding are required to get all the parts to fit together properly. To keep everything secure, you can use a drill bit to enlarge any necessary holes, then insert small pieces of filament as locks to hold things in place.