How to charge mobile phone battery

1. The mobile phone battery is composed of three parts: the battery cell, the protection circuit and the shell. The current mobile phone batteries are all lithium-ion batteries (often referred to as lithium-ion batteries in irregular situations), and the cathode material is lithium cobalt oxide. The standard discharge voltage is 3.7V, the charge 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 batteries is 3.7V, so mAh (milliampere hour) can also be used instead. The conversion relationship between these two types of units on the mobile phone battery is: watt-hour u003d ampere hour × 3.7.2, overcharge, overdischarge and short circuit will seriously damage the performance of the battery, and may lead to risk of use. For this reason, there is generally a slender protection circuit board in the mobile phone battery to prevent these risks. 3. The charger is divided into direct charge and seat charge. Direct current converts 220 AC mains power into 5V DC, which is input into the mobile phone and used by the mobile phone's charging circuit to step down the voltage to the battery. Generally, there will be delivery when buying a mobile phone. The charger is directly connected to the battery, and converts the mains power to the required voltage for the battery. 4. If you want to use a cradle charger, please try to choose original or excellent quality products. If the charging circuit in the cradle is of poor quality, there will be a charging risk. 5. Lithium-ion battery has no memory effect, but it is inert. If it is not used for a long time, there may be passivation. The best performance can be restored by charging and discharging several times. 6. Before charging, do not discharge lithium-ion batteries. Some fast chargers only indicate that they are 90% full when the indicator light changes, and the charger will automatically change to use slow charging to fully charge the battery. But generally speaking, as long as the display is full, it can be removed. 7. In order not to damage the battery life, it is best to charge slowly when charging; the time does not need to be too long. 8. Mobile phone batteries have self-discharge, because over-discharge will damage the battery. If the mobile phone battery is not used for a long time, it should be ensured that the battery has a certain amount of power. 9. Although our mobile phone is within the network coverage area, our mobile phone can no longer accept and make calls when the mobile phone is turned off and charged. At this time, we can use the mobile phone's untalked transfer function to transfer the mobile phone to a 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 temporarily unable to connect. 10. Don't expose the battery to high temperature or severe cold, like in the dog days, don't put the mobile phone in the car to withstand the scorching sun; or take it in an air-conditioned room and place it in a place with direct air-conditioning. When charging, it is normal for the battery to have a little heat, but it should not be subjected to high temperatures. In order to prevent this from happening, it is best to charge at room temperature and do not cover anything on the phone. 11. When charging, the longer the better, the charging should be stopped after the inferior battery without protection circuit is fully charged. Separate the battery from the phone if it is not used for a long time. 12. The newly-purchased battery does not need to be charged for 12 hours for the first use, but it is best to perform a full charge and discharge process for 3 to 5 hours. Full charge means normal charge to 100%, and full discharge means when the phone is used to remind when the battery is low. Because the battery has to go through the process of filling electrolyte, forming, charging and discharging, and dividing the capacity before leaving the factory, so that the battery is in the activated state, but after leaving the factory, it takes as little as a month to more than a year to reach the user's hands. Due to the influence of discharge, the battery material becomes passivated. At this time, the battery can be activated through full charge and discharge. In the use of lithium-ion batteries, it should be noted that after the battery is left for a period of time, it enters the dormant state. At this time, the capacity is lower than the normal value and the use time is also shortened. But lithium-ion batteries are easy to activate, as long as 35 normal charge and discharge cycles can activate the battery and restore normal capacity. Due to the characteristics of the lithium-ion battery itself, it is determined that it has almost no memory effect. Therefore, the new lithium-ion battery in the user's mobile phone needs no special methods and equipment during the activation process. Not only is this true in theory, but from my own practice, it is best to use the standard method to recharge this natural activation method from the beginning. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.