What are the charging methods of mobile phone battery

1. Mobile phone battery consists of three parts: cell, protective circuit and shell. At present, all mobile phone batteries are lithium ion batteries (often referred to as lithium batteries in non-standard situations), and the cathode material is lithium cobalt. The standard discharge voltage is 3.7V, the charging cut-off voltage is 4.2V, and the discharge cut-off voltage is 2.75V. The unit of power is Wh (watt hour). Because the standard discharge voltage of mobile phone battery is 3.7V, it can also be replaced by mAh (milliampere hour). The conversion relationship between these two types of units on mobile phone battery is: watt-hour=ampere-hour × 3.7。
2. Over-charge, over-discharge and short circuit will seriously damage the performance of the battery and may lead to use risks. For this reason, there is usually a thin and long protective circuit board in the cell phone battery to prevent these risks.
3. Chargers are divided into direct charging and seat charging. Direct charging converts 220 AC mains power into 5V DC power, which is fed into the mobile phone and depressurized to the battery by the charging circuit of the mobile phone. Generally, there will be distribution when purchasing the mobile phone. The seat charger is directly connected with the battery to convert the mains power into the required voltage for the battery.
4. If you want to use the seat charger, please try to choose the original or high-quality products. If the quality of the charging circuit in the seat charge is poor, there will be charging risk.
5. The lithium-ion battery has no memory effect, but it is inert. If it is not used for a long time, it may have passivation. The best performance can be restored after several times of flushing and discharging.
6. Before charging, the lithium battery does not need special discharge. When the indicator light of some fast chargers changes, it only means that the battery is 90% full. The charger will automatically change to fill the battery with slow charge. However, in general, as long as the display is full, it can be removed.
7. In order not to damage the battery life, it is better to charge slowly when charging; The time need not be too long.
8. The mobile phone battery has self-discharge, because over-discharge will damage the battery. If the mobile phone battery is not used for a long time, it should be guaranteed that the battery has a certain amount of power.
9. Although our mobile phone is within the network coverage area, when it is powered off and charged, our mobile phone can no longer accept and make calls. At this time, we can use the disconnected transfer function of the mobile phone to transfer the mobile phone to the fixed phone nearby to prevent the loss of incoming calls. This method is also applicable when the mobile phone is not in the network coverage area or the signal is weak and cannot be connected temporarily.
10. Do not expose the battery to high temperature or severe cold, like in dog days, do not put the mobile phone in the car to withstand the sun; Or take it to the air-conditioned room and put it in the place where the air conditioner is blowing directly. When charging, it is normal for the battery to have a little heat, but it cannot be allowed to endure the "suffering" of high temperature. To avoid this, it is best to charge at room temperature and do not cover anything on the phone.
11. The longer the charging time, the better. The charging should be stopped after the inferior battery without protective circuit is fully charged. If it is not used for a long time, separate the battery from the mobile phone.
12. The newly purchased battery does not need to be charged for 12 hours for the first time, but it is better to complete the charging and discharging process for 3 to 5 hours. Full charging means normal charging to 100%, and full discharging means when the mobile phone uses the low battery reminder. Because before leaving the factory, the battery needs to go through the process of filling electrolyte, forming, charging and discharging, and dividing capacity to make the battery in the active state, but after leaving the factory, it will take at least one month or more than one year to reach the user's hands. Due to the impact of battery self-discharge, the battery material is passivated. At this time, the battery can be activated through full charging and discharging. [1]
In the use of lithium battery, it should be noted that the battery will enter the sleep state after being placed for a period of time. At this time, the capacity is lower than the normal value, and the use time will also be shortened. However, the lithium battery is easy to activate, as long as it passes through 3-5 normal charging and discharging cycles, the battery can be activated and its normal capacity can be restored. Because of the characteristics of lithium battery itself, it has almost no memory effect. Therefore, the new lithium battery in the user's mobile phone does not need special methods and equipment during the activation process. Not only in theory, but from my own practice, it is the best to use the standard method of charging from the beginning.