The plastic frame is provided with isolation boards and LED light isolation grooves, and the area where the battery cells are located is fixed with double-sided adhesive tape.

The front view of the PCB board, the capacitor is reinforced with glue, and the right side is equipped with a shielding cover for the buck-boost circuit area.

A look at the back of the PCB board. Vias are designed in many places, insulating tape is pasted at the connection between the battery cell and the circuit board, and the thermistor pad is glued for reinforcement.