PowerBank under 3$

A PowerBank under 3$ could be a nice project to deal with. It can also be usefull for my gigantic 7 segments Arduino clock project

So I decided to make a portable power bank using 5 Samsung P22 18650's Li-Ion batteries wired in parallel giving me a nice 11Ah power supply.

To speed up charging of the PowerBank I added a XT60 plug so I can use my RC battery charger to charge it really fast!

GOOD LUCK (: