What is the reason why the mobile phone cannot be charged? There is a charging sign.

It may be that the mobile phone system is faulty, the charger is faulty, the charger is in poor contact with the mobile phone, or there is a problem with the mobile phone battery.

The details are as follows:

1. Mobile phone system failure

As a result, there is a problem with the battery power display. This kind of problem is the easiest to solve. You can directly shut down and restart. This is equivalent to refreshing the data, and the general power display will return to normal.

2. Charger failure

This failure is the main reason why the mobile phone cannot be charged. So how to judge the quality of the charger? It's actually very simple, just try another charger. If it can be charged, then you can conclude that the charger is faulty. If you encounter this kind of problem, you have no choice but to buy another charger.

3. Poor contact between the charger and the mobile phone

This situation is also very common. Due to the carelessness of mobile phone users, the charger is not plugged in properly. The solution is simple, just change the socket back and forth.

4. Mobile phone battery problems

Generally speaking, mobile phone battery problems are rare. But once there is a problem, it is a big problem and must be taken seriously.

Therefore, when it is found that the charger and mobile phone system are not faulty, you should focus on checking the battery. If you find that the battery is swollen, it means there is a problem with the battery and you must stop using it immediately. Don't take any chances.

Extended information:

Misunderstandings about the use of mobile phone power

1: Recharge the mobile phone after it is exhausted

Influenced by the use of nickel-metal hydride batteries As a result, many people still like to charge their mobile phone batteries after they are completely exhausted. For lithium batteries, this will not prevent the memory effect, and the lithium element activity will be insufficient when recharging after the power is used up. This will affect the battery capacity in the long term.

Two: Mobile phone batteries should be fully charged (or drained) if they are not used for a long time

Many people have multiple mobile phones or batteries at home, and some batteries will be left unused for a long time. , many people adopt two extreme approaches - fully charging or emptying. In fact, both of these methods will affect the life of the mobile phone. The correct method is to charge the mobile phone to 40~60% and store it in a cool and dry place.

Three: Overcharging can cause battery explosion

Lithium batteries generally have safety protection circuits and various safety devices to ensure that the battery circuit is automatically cut off in the event of overcharge, discharge or short circuit; If the internal pressure of the battery is too high, it will trigger the exhaust device to decompress; if the battery temperature is too high, it will trigger the thermal melt protection device, thereby stopping the electrochemical reaction of the battery.

Therefore, unless there is a quality problem, the battery will not explode due to being plugged in and charged for a long time. However, if you do not unplug the power supply after it is fully charged, the battery will remain fully charged. Although it will not explode, it will speed up the loss of battery capacity.

Reference material: Baidu Encyclopedia-Mobile phone battery