Powerbank IP5328P

Just needed a big powerbank with a small footprint. Be aware the sides are only 1mm thick. So don't throw this thing around. You are going to need an IP5328P module. It's fairly easy to work with. Plus & minus to the 8 x 18650 cells in parallel and you are good.

Size: 82x40x80

Things needed to build
IP5328P module costs about 3,-
8 x 18650 cells
2 x short cables (to connect the battery to the module)
2 x small screws (took some PC screws had laying around)
Maybe some glue to give the board an extra hold

You are going to need some holes for the holder. Just import it in you favourite design tool (I use tinkercad.com for that) and make the adjustments accordingly.