Flask Power-Bank

Here is an easy to make Power-Bank that looks like an alcohol flask. It uses the circuit of an unpopulated and cheap power bank and 3 18650 cells recycled from a old laptop battery.

It needs 4 2.5 mm x 10 mm and 4 2.5 mm x 20 mm screws to close.
I printed the top (threaded) and the biggest part with support, not sure if the really need it.

More info (in french) : http://espace-tuto.com/flasque-power-bank-chargeur-usb-portable/