How to measure the quality of a 12v battery?Simple method of measuring remaining battery power

To check the quality of the 12v battery, you can use a multimeter to measure. The multimeter measures the voltage of the battery, and can judge whether the 12v battery is good or bad through the displayed data. The normal value of the battery voltage is between 12 and 14v. In general measurement, if the voltage of the battery is normal or above, then the number will be higher than the normal value. If the number is lower than the normal value, it means that the battery is in poor condition. , The owner will pay attention.

Simple method of measuring remaining battery power:

1. Press the horn directly. If the horn does not sound before, it means that the battery is low;

2. Turn on the front headlights, if the lights are white and the surface battery is normal, if the lights are red and dim, it means that the power is insufficient;

3. Use the voltage range of a voltmeter or a multimeter to add a load to detect the storage capacity of the battery. The remaining capacity can only be estimated by the voltage, which is not too accurate;

4. Open the hood to find the battery, and then find the electric eye on the battery. The green electric eye means that the battery is good, the black one means it needs to be charged, and the white one means it needs to be replaced.

The car battery needs maintenance, so that it can be used for a longer period of time. It will not break so easily. The maintenance methods are as follows:

1. Long-term parking of the vehicle will cause the battery's power to be slowly lost, and the battery will lose power. Therefore, the engine must be started regularly to avoid long-term parking of the vehicle;

2. If there is really no way to start the vehicle to replenish the battery's power, and it must be parked for a long time, you can unplug the battery's positive and negative connection lines before parking;

3. Regularly check and clean the terminals, accessories and connection lines of the battery, and apply special grease to the terminals to protect the wiring harness;

4. Try not to use on-board electrical appliances after the car is turned off;

5. It is forbidden to start the car repeatedly, otherwise it is easy to cause the loss of the battery.