How can I know that the battery is dead?

　　Author ：Iflowpower – Portable Power Station Supplier

The service life of the battery is generally in 3-5 years, which has a big relationship with the scientific use of the battery. Some friends use the CD machine in the parking time, using the use of a useless device on the cigarette lighter, which will cause the battery to decrease the voltage due to the timely charge, and even the polar surface falls off, the battery is shortened due to excessive discharge. So how do you judge the battery without electricity? 1.

Open the ignition switch, hear the sound when starting the engine, and the engine does not run. 2, press the speaker sound obviously hoarse. 3, indoor lights and headlights are not very bright.

With the above characteristics, it can be concluded that the battery loss is. If the headlights suddenly suddenly decrease or the speaker sounds during the driving process, it should be diagnosed as generators do not generate electricity, immediately check the carbon brush, if it is a carbon brush, it should be replaced in time. If the vehicle has notned fire, the manual vehicle can use the cart to start the car, the operation is as follows: Open the ignition switch, step on the clutch, when the vehicle is pushed up, and the clutch can be utilized.

Magnetoelectric power generation will push the car; the automatic file car should be external 12 volt power supply to open the ignition switch after connecting the battery cable to start the car, small tips: the battery is negative polarity. .