How to measure the battery voltage

Choose an appropriate load resistance and connect it in parallel between the positive and negative poles of the battery. There is a certain known relationship between battery voltage and remaining power, so according to the capacity and purpose of the battery, measure the voltage at both ends of the resistor and see how much the voltage drops when the battery is under load compared to when it is no-load, then the battery capacity can be judged; However, the prerequisite is that when no load is applied, after the load is applied, the battery voltage will cause voltage drop distortion due to internal impedance, and gradually decrease at different rates over time, and gradually increase after removing the load. Therefore, if a load is applied, it will affect the test results of the dry battery power. The multimeter can also accurately measure the voltage of the dry battery, by measuring the voltage of the dry battery, to judge the electric quantity. Dry batteries include alkaline batteries and carbon batteries. If the measured voltage is not less than the marked voltage of the dry battery, it means that the dry battery has sufficient power; the more marked voltage is less than the dry battery, the more the dry battery loses power. The test results of the dry battery will be affected due to different types of dry batteries, but for a single cell For dry batteries, as long as you use an ordinary pointer universal meter, select the maximum current range (0.5A-1A) of the universal meter, connect the negative test lead to the negative electrode of the battery, and quickly touch the positive test lead on the positive electrode of the battery. Pay attention to the movement of the needle (short-circuit current). ) Situation, you can understand how much power is left in the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous: What are the cylindrical specifications of lithium-ion batteries?