3xCRGR 18650 power bank

thingiverse

I designed this 3x battery version of my original CRGR, a 18650 power bank that's perfect for use with three 18650 batteries. Everything remains the same as the original design, but I made adjustments to accommodate the 3-battery setup. This model fits perfectly with a USB boost converter and even accommodates slightly longer batteries. To connect the wires securely, insert them into a long groove on the side and secure them using a spring terminal at the deep end. Any excess wire can be tucked under the PCB; just make sure to slide in the micro USB connector first. I used the "DC-DC Step Up Power Module Boost Converter" from AliExpress, which I purchased for around 7 dollars for a pack of five modules. A picture of this module is attached so you know exactly what to buy if you want to build your own power bank. For reference, my original CRGR 18650 power bank can be found here: https://www.thingiverse.com/thing:2765404 To make a dual-power bank setup, check out the 2xCRGR 18650 power bank design here: https://www.thingiverse.com/thing:2769739