200Wh, 100W USB-C PD Power Bank
I built a ~200Wh, 100W USB-C PD power bank from 18650 cells I had lying around, and a cheap PCB from AliExpress. BOM: USB-C PD board: 15€ 20x 18650 cells: 50€-ish1 Nickel strip: ~1€ Also needed: 3D printer and some filament (PLA is fine) soldering iron hot glue gun fire extinguisher good insurance The PCB ...