Connect the anode and cathode of the battery detector to the anode and cathode of the battery, and automatically enter the system to select the model of the battery, such as 34B 19, 55B24 and 55D26 (marked on the battery) for measurement, so as to measure the charging state and health state of the battery. The state of charge is the charge of the battery, and the measured value is a percentage. When it is less than 100%, it can be charged. The health state is the storage capacity of the battery. When the measured value is 0%, it means that the life of the battery has been exhausted. Replace the battery as much as possible. Otherwise, even if it can be used temporarily at present, it may one day be started without power.
In addition, the battery capacity can also be judged by listening to the sound of the starter when the engine starts. If it sounds weak and the engine rotates weakly, it proves that the battery is low (except for the starter failure).
1, how to judge whether the battery is low?
A: Generally speaking. To judge the charge of the battery, we must first listen to the sound when the starter starts. If it doesn't sound bad, there are two situations. One is insufficient battery, and the other is maintenance of starter. The battery on the dashboard mainly depends on whether the generator generates electricity after the car starts. When it is on, it means that the generator does not generate electricity and needs maintenance. Generally, you can't see the battery charge.