Devon battery repair

20V 5.0AH

Model no:

5150-LI-20-50

Battery:

Highstar

3.7V ISR18650-2500

INR19/66 Li-Ion

10 pieces

Symptom:

Red LED blinking on the PCB module,aka 保護板 :

Suggested voltage check:

My measurements:

4.1V,3.7V,4.1V

Seems the Li batteries are ok, only the PCB board is needed to be replaced

PS: some terminals are cover by white silicone,and. Hard to find

Repair:

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