20pcs 1S Lithium Battery Pack Power Indicator Board Electric Vehicle Battery Power Indicator 4V Power StorageInstructions: Connect the positive and negative terminals of the display board and connect them to the positive and negative terminals of the tested battery. The digital display shows the real time battery power. Power parameters: 1S lithium battery, full charge 4. 2V Battery voltage is greater than N X 3. 3V, light 1 grid power The battery voltage is less than N X 3. 3V, the power indicator is all off, indicating that the battery is lower than 3. 3V,
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20pcs 1S Lithium Battery Pack Power Indicator Board Electric Vehicle Battery Power Indicator 4V Power Storage