KiCad boards from 1 GitHub repository tagged “backpacking”, the most starred first; open any of them in PCBKit.
MidwestMotorBoy/Battery-Bank
Monolith: an ultralight IP67 power bank for backpacking. 4S BAK 65E 21700 (91 Wh, under the 100 Wh airline limit), two bidirectional 100 W USB-C PD ports, Bluetooth LE (TI CC2340) with an iPhone app.
MidwestMotorBoy/Battery-Bank
Monolith: an ultralight IP67 power bank for backpacking. 4S BAK 65E 21700 (91 Wh, under the 100 Wh airline limit), two bidirectional 100 W USB-C PD ports, Bluetooth LE (TI CC2340) with an iPhone app.