I love tinkering with everything!
our power bank stopped charging and I took a screw driver and popped it open .
Step 1: Have a Broken Power Bank ??
you will need:
arduino uno r3
usb hub (from inside a power bank ) with 3 usb ports mine also had an led array.
2 jumper wires
usb cable for arduino
and maybe pizza .
put one wire into the 5v pin on the arduino
an the other into the gnd pin under it.
tape the 5v wire on the positive terminal of the hub.
tape the gnd wire on the negative terminal.
Step 4: You Are Finished!
plug the arduino into your computer or a 5v supply and then plug your phone into one of the hub's usb ports
turn the hub on and it will charge your phone,lamp,power bank and many other things.