3.7v 2200mah 18650 lithium battery

　　When should the car battery be replaced and how to remove it?

　　1. Car battery replacement time

　　1. The car is more difficult to start than usual

　　In the absence of other factors, if you suddenly find it difficult to start your car, it may be a sign that the battery is about to expire. Of course, there is another situation in winter, which is the so-called cold start difficulty in winter. This depends on whether the car is new or if it is almost time for the battery to expire.

　　2. The battery failure alarm light is on

　　There is not much to say about this, the fault light is a direct reminder. You really need to go to a 4S or repair shop to check whether the battery is damaged or the charging system is faulty.

　　3. When starting, the starting ability of the starter becomes poor and there is abnormal sound.

　　It may be due to the weakening of the battery's discharge capacity and the poor operation of the starter that it makes a squeaking sound. This situation is especially obvious at low temperatures. Because the weather is cold, the activity of the battery will also be reduced. This situation will improve or become worse after the weather gets warmer. disappeared, so many car owners didn't take it seriously.

　　4. Observe changes in the port

　　There is an observation port on many maintenance-free batteries. There is a light that shows whether the battery is working well. If it is green, it means good, and if it is black, it means the battery needs to be replaced. However, some car owners report that this light is unreliable and the vehicle cannot be started even if it is green. As a reference.

　　5. The battery bulges and leaks.

　　The main thing here is to see whether the battery is leaking or bulging. If such a situation occurs, it should be replaced in time. This situation not only brings problems with the battery life, but also certain safety hazards.

　　6. Voltage changes before and after starting

　　The normal voltage of the battery is about 12V. After starting, due to the charging of the generator, the voltage will increase to about 13-14V. Many vehicles have a voltage detection function. Paying attention to the voltage before and after starting is also a good way to judge the battery life. Vehicle If it is lower than 12V when not started or lower than 13V after starting, you should consider whether there is a problem with the battery. However, it does not rule out that the charging system is faulty.

　　2. How to disassemble the car battery

　　1. Loosen the nut of the negative electrode connector: Open the two fixing buttons of the insulation cotton, and you can see the two red and black insulation covers on the positive and negative electrode connectors. Open the insulation cover and you can see the locking nut;

　　2. Disassemble the negative electrode connector: Use a wrench or hex socket to unscrew the fastening nut of the negative electrode, then use a flat-blade screwdriver to slowly pry open the fastening block, and then pull out the negative electrode connector;

　　3. Disassemble the positive connector: Use the same method to disassemble the positive connector;

　　4. Disassemble the locking strap: Unscrew the nut used to fix the battery's locking strap, loosen the locking strap, and then take out the battery.

　　5. When installing a new battery, just follow the reverse steps. However, it should be noted that when installing the positive and negative connectors, the order of "positive first, then negative" is followed, which is opposite to that of disassembly. The principle is the same, both to prevent the risk of short circuit and ensure safety.

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