20pcs 1S Lithium Battery Pack Power Indicator Board Electric Vehicle Battery Power Indicator 4V Power Storage

Instructions: 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, the battery needs to be charged.(N is for the number of battery cells) Note: The above data is a reference value, there will be about 2% error range. Package included: 20 X 1S lithium battery pack power indicator board