12V 18650 Battery Pack with ON/OFF switch

Introduction:

This was design to have a portable 12v battery pack. The cells that I put on it are 18650 but them are fake ( the capacity is false ) It has space for a 3 cell battery protection circuit like on the pictures.

Part list:


Battery protection circuit
DC panel 5.5x2.1mm
On Off Switch


Notes:

This design was printed by a friend of mine. I don't now which setting he used.