Voltage test pen battery undervoltage prompt
When the battery of the test pen is low, it will automatically shut down after the induction light and buzzer alarm three times. The battery needs to be replaced at this point.

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Apr 09, 2022
Voltage test pen battery undervoltage prompt
When the battery of the test pen is low, it will automatically shut down after the induction light and buzzer alarm three times. The battery needs to be replaced at this point.

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