Car battery is a very important component of our cars. Many car owners believe that they do not need the  car batteries repairs. Is this true? No! We can not start our car without car batteries. The health of the car battery determines our ability to properly use our cars. So I have to take you to learn some knowledge about some car batteries now.

1. If the car battery was not in use  for a long time, it will slowly self-discharge, till the end of its life. So we need to start our car to recharge the car battery regularly.

2. We need to recharge the car battery when the ammeter shows charge capacity is low.

3.The density of the electrolyte should be in accordance with different regions and different seasons according to the standard be adjusted accordingly.

4. When starting the car, start the opportunity to lead to continuous use car battery damagedue to excessive discharge.

5. We should always check whether the battery cover ventilation holes.

And the following are the things that causes of damage leading to car battery：

1.  Excessive discharge.
2. Prolonged storage batteries.
3. Can not charge through the car engine.
4. No electrolyte.
5. Electrolyte specific gravity is too high.
6. Charge in high temperature conditions.
7. Contamination by dirt.
8.  Battery charging with large current.
9. The positive electrode plate and the plate deformation caused by contact between the plate package, resulting in short circuit.
10. Deposition in the upper and lower plates with dirt, causing a short circuit.

Car battery life is only two years of general. Therefore, we should pay attention to our own car battery repairs. These knowledges are very important and everyone should know it and use it in practice.