This simple print holds the commonly found diymore 16340 battery boards. They support recharging, 5V and, 3.3V outputs.
The breadboard slides into the holder
The battery can be secured with m3x6mm screws or m2.5x6mm screws (with heated inserts)
The 2x model requires you to remove one power rail from one of the breadboards
The author marked this model as their own original creation.