2xCRGR 18650 power bank

thingiverse

That's the upgraded 2x battery version of my original CRGR design. Everything is identical, but it's specifically designed for use with two high-capacity 18650 batteries. The model fits perfectly with this USB boost converter and even accommodates slightly longer batteries. To secure the wire, use a spring terminal in the deep recess. The wire should be inserted into the long groove on the side of the module. Any excess wire can be tucked under the PCB, but make sure that the micro USB connector fits snugly into its slot first. The DC-DC Step Up Power Module Boost Converter I used is available from AliExpress for around 7 dollars per unit, with a pack of five units. A picture of the module is attached below for easy identification if you want to create this power bank yourself. CRGR - 18650 power bank design: https://www.thingiverse.com/thing:2765404 3xCRGR 18650 power bank design: https://www.thingiverse.com/thing:2780597