mini 18650 powerbank

a small 2x 18650 powerbank enclosure.

small, compact and very simple to print and build but also very handy to have when out and about.

the board I used:
https://www.banggood.com/3Pcs-Dual-USB-5V-1A-2_1A-Mobile-Power-Bank-18650-Battery-Charger-PCB-Module-Board-p-1133268.html?rmmds=myorder&cur_warehouse=CN

the batteries I salvaged from an old laptop battery pack (saved just chucking it out)

all you'll need hardware wise are 6x M2x10mm screws/bolts to slap it all together, doesnt require any gluing etc, the whole thing is so compact there's no room for anything to rattle about inside.

the indented button one end can be held to turn the bank on and off (though the board auto powers when somethings plugged into the usb ports anyway) or double clicked to turn the led torch on at the other end.

the display obviously shows voltage percentage in the batteries but also displays power in and out aswell as voltage/ampage out.

to build:

solder a couple of wires to your boa