The method of car battery voltage detection is to prepare a multimeter that can be used normally, and prepare the car battery. Specific steps are as follows:
1. Before connecting the meter in series, you need to set up the meter first, and select the type first. Turn the knob to the current position of DC, the symbol is a horizontal line above, three dots in the middle, and a capital A below. It is not necessary to select a measuring range for this meter. Ordinary multimeter should choose current 10A or DC 20A;
2. Then select the position of the probe, the black probe is always in the COM position, and the red probe selects DC 10A or DC 20A;
3. Finally, connect the battery. First turn off the key and all electrical appliances in the car, and remotely lock it. Connect the red probe to the battery cable and secure it firmly. Loosen the screw of the negative cable, connect the black probe to the battery end, and slowly remove the negative cable;
4. According to the correct connection method, use the multimeter to connect the multimeter in series between the battery and the negative cable. The normal leakage is below 30-50mA.
This data is for reference only. Generally speaking, a 65AH battery, a 65AH battery, means that it is discharged at 1A per hour and can be stored for 65 hours. Total volume leak = leak hours. Hourly leakage 24 (24 hours in a day) = days.
