• 1

    Just print the 2 STL file.

  • 2
    Make the electronic

    Solder the battery to B+ and B- to the TP4056, Then solder the GND.- of the fan to the the TP4056,
    Solder the ON/Off button to the fan, then solder the on/off to the Volt.+ TP4056.

  • 3
    Attach the fan with M3 nuts and screw

    Attach them to the case