1. Headlights
Open the headlights, if the light is white bright, it indicates that the battery is normal; if the light is reddish dark, it means that the power is insufficient. Turn on the starter, if the speed is normal, the light is slightly dimmed, but still have enough brightness, it means that the battery is good, charging is more sufficient; if the starter appears to be powerless, and the light becomes dark, it means that the battery is over-discharged, and it is recommended to charge and maintain or replace it immediately.
2. Horn
Press the horn button, if the horn is not in the car when the sound is relatively small, indicating that the battery power is relatively weak, you need to be careful, it is recommended to go to the battery store or 4S store to test the battery.
3. Observation hole
Some batteries have an observation hole at the top of the battery, the color of the hole indicates the state of his power storage, green indicates normal, black indicates a power loss, white indicates that the battery has been damaged, should be replaced as soon as possible. Note: Because the observation hole is not accurate enough, sometimes false alarms, and then most manufacturers have canceled the observation hole.
4. Starting Feeling
The starter will feel weak when you start the car, but the car will still start as usual. Or the car does not start as smoothly as before, for example, the original 1 second start now takes 3 seconds, start difficult. Then again, a simple point, when you hear "pit pit pit" sound is normal, if you hear "pit uh uh pit uh uh uh pit uh uh uh" that means to hang up.
5. Directional assistance
When you drive around the corner, suddenly feel that the directional assistance does not work, there are redundant movements, the seriousness of the sudden loss of directional assistance, some cars engine tachometer in the idle and the normal speed of the speed of the car back and forth between the jump, the dashboard lights are on and off, even if it is a straight road. At this time, the owner generally thought that the electric power to hang, but wait until after going to the 4S store test, found that the original is the battery does not work, after changing the new battery, everything back to normal.
By definition, the generator should still be working while traveling, and should not be in that condition. However, if the battery is severely depleted, the generator's power supply will not be able to meet all the vehicle's power needs while traveling, and poor or lost power will occur. It is recommended to purchase a cigarette lighter voltmeter, some with a USB charging port.
6. Windows
The windows are not as sharp as they used to be when they were raised, and there is a gnawing sensation, indicating that the battery is dying and needs to be tested or replaced.
7. Vehicles placed
Vehicles placed 3 to 5 days on the ignition, indicating that the battery is dying, need to test or replace.
Of course, the above fool's errand is not absolutely accurate, and sometimes it's just because the battery has lost power, and everything will be back to normal after it's recharged. Sometimes there is no warning that the car battery is hanging.
In addition, the car battery is most afraid of power loss, power loss will seriously affect its service life. For example, install a hanging sound, and square dance mom try to compare high; then, for example, every day to work and drive more than 10 minutes, even when the start of the power consumption has not had time to charge back; and so on. In this way, it is quite normal to change a battery in a year and a half.
The above is a sensory differentiation method, which is strictly speaking not scientific enough. So what are the scientific criteria for determining when a battery should be replaced?
The world's automotive starting batteries are almost exclusively lead-acid batteries, lead-acid batteries are characterized by: with the use of the battery, the battery is gradually aging, when the capacity of the battery is reduced to 80% of its original rated capacity, the battery capacity may show a "dive-style" decline, although the storage battery Although the storage battery can still provide a certain amount of energy, but may be scrapped at any time. Therefore, in the international and domestic battery industry, 80% of the battery capacity as a lead-acid battery needs to be replaced threshold. How to know the capacity of the battery is lower than 80% of the original rating? With the help of the following battery tester, to test the battery's internal resistance and plate capacitance, to make a scientific judgment on the battery's condition.
Battery Tester
The tester will show you the parameters visually and whether the battery needs to be recharged or replaced. If you don't plan to keep such a tester at home, remember to test it every time you go to a 4S store for maintenance or pass by a battery store. Generally speaking, the car battery life is 5 years, but now many cars only 2-3 years, this is mainly because of the usual overuse or lack of maintenance, such as many young people in the car modification of the stereo, add a variety of fun facilities, etc., so that the battery life is greatly reduced.
To make the battery last longer, you should pay attention to the following maintenance methods:
1. Turn off all electrical appliances before leaving the car;
2. Don't use electrical equipment for a long time when the car engine is turned off;
3. Don't install additional electrical loads at will;
4. If there is a long-term travel plan, you need to start the car every 15 days or so.
4. If there is a long term traveling plan, you need to start the vehicle and run it for 20 minutes every 15 days or so. If the vehicle is stored for more than 15 days, the negative battery cable should be disconnected.
5. Check the battery voltage every three months: open-circuit voltage>12.4V, for normal battery; open-circuit voltage <12.4V, for the loss of battery, must be replenished.
6. For the battery on the vehicle stocked for more than one year, if the battery is never replenished according to the above requirements, the battery must be replaced and the battery must be scrapped.
6.