Change Voltage For PWY series LiFePO4/Li-ion Charger

！！！high voltage inside, non-professionals do not open！！！

！！！Please note that opening the charger privately will void the warranty.！！！

1：PWY Charger inside view

2：Modify the resistance of the R15 series resistor to change the output voltage.

The red R15+ and  R15A in the figure are in parallel relationship with R15B .

3：The factory is a fixed resistor installed in the R15B position. The reason why the fixed resistor is used is because the adjustable resistor will loosen during the motion and vibration, causing the charger output voltage to change.

We changed the output voltage by modifying the adjustable resistor, first removing the R15B resistor.

4：When looking at the front, three resistance solder joints.

5：After removing R15B, add a resistor at the R15 and R15A positions. The resistance is based on the resistance of the original R15B position.

The resistance modification is completed, and the output voltage is slightly modified by an adjustable resistor.