How to detect the health and life of automobile batteries?

How to check the health status and service life of automobile battery is as follows: 1. If the battery status indicator lights up, it means that the battery is low. Please start the engine or check the battery status. At this time, you can observe the use of the battery by yourself. At present, many models of batteries have an observation hole, which is generally located in the upper right corner of the battery. If the color in the observation hole is green, the battery is in good condition; If it is black, the battery capacity is not enough; If the inside has turned white, it means that the battery will run out quickly and needs to be replaced in time. Starting the vehicle is more difficult and boring than usual. Need to ignite many times, and feel that the starting power is insufficient. It is also possible to judge whether the battery needs to be replaced according to the color in the observation hole. 3. If the vehicle catches fire and hears a "click", it means that the battery is seriously insufficient and needs to be replaced in time. 4. When idling at night, the on-board generator is insufficient to provide power for the night light. At this time, it is basically powered by batteries. If the battery life is short and the power is not enough to provide sufficient lighting power, the lights will be obviously dimmed. The battery should be replaced in time to avoid affecting driving safety.