How to Use a Multimeter to Measure Leakage Current
Method 1:
Select an appropriate load resistor to be connected in parallel between the positive and negative poles of the battery.
There is a known relationship between battery voltage and remaining battery capacity, so based on the capacity and purpose of the battery, the voltage at both ends of the resistor can be measured to see how much the voltage drops when the battery is loaded compared to when it is unloaded, and the battery capacity can be determined; However, under the premise that e79fa5e98193e78988e69d8331333365666266 pieces are not subjected to any load, the battery voltage will cause voltage drop distortion due to internal impedance after loading, and gradually decrease at different rates over time, and gradually increase in height after removing the load. Therefore, if a load is applied, it will affect the detection results of the dry battery power.
Method 2:
A multimeter can also accurately measure the voltage of a dry battery. By measuring the voltage of the dry battery, the power level can be determined. Dry batteries include alkaline batteries and carbon batteries.
If the measured voltage is not less than the marked voltage of the dry battery, it indicates that the power of the dry battery is sufficient; The more marked voltage less than the dry battery, the more power loss the dry battery has. Due to different models of dry batteries, the detection results may be affected. However, for a single dry battery, as long as a regular pointer type universal meter is used, select the maximum current range (0.5A-1A) for the universal meter, connect the negative lead to the negative pole of the battery, and quickly touch the positive lead on the positive pole of the battery. Pay attention to the movement of the meter needle (short circuit current), I know how much battery power is left.
Method 3:
Two identical batteries at home have a measured open-circuit voltage of 1.5V, and the battery level can be detected by measuring the internal resistance of the battery. Firstly, measure the open circuit voltage of the battery, and then connect a load (such as a small lamp bead) to the battery. The voltage of the battery will decrease, and the voltage will be measured. The difference between the open-circuit voltage and the on-load voltage divided by the on-load working current can roughly calculate the internal resistance of the battery. The larger the internal resistance, the smaller the battery's charge.
