What is the correct posture for charging a mobile phone? Please keep this instruction.

  The second stand

  Many people find that after a few days of use, the mobile phone battery charges faster and faster, but the standby time is getting shorter and shorter. In order to make their mobile phone batteries more durable, many people choose to turn to the internet and follow the tips on how to extend the battery life. But you know what? Many online charging methods are wrong, and you have been cheated for so many years.

  Should the battery be completely exhausted before charging?

  No way! "Deep discharge" will damage the battery.

  There used to be a saying that the battery has a memory function, and you must wait until the battery of the mobile phone is completely exhausted before charging it to 100%, otherwise the battery will "remember" the proportion that needs to be charged, so that it needs to be charged before the battery is used up, and the charging will not be full.

  "Now smartphones use lithium-ion batteries, and the technology and structure of lithium batteries have undergone tremendous changes. It is wrong to recharge the mobile phone battery after it is completely exhausted." Wang Yonggang, a leading enterprise of new energy power battery and R&D engineer of Tianneng lithium battery, told the Science and Technology Daily reporter that the so-called "deep discharge" when the battery is completely exhausted may have an irreversible impact on the internal material structure of the battery and shorten the battery life.

  When charging, positive lithium ions "jump" into the electrolyte from the positive electrode, "climb" through the winding holes in the diaphragm, "swim" to the negative electrode, and combine with the electrons running from the positive electrode early; The opposite is true when discharging. Dr. Zhang Hua, who graduated from the Department of Materials Science and Engineering at the University of California, Los Angeles, made an analogy: whether it is discharging or charging, lithium ions have to get away from the original structure, which is a bit like carrying a bunch of things from one room to another. Therefore, the understanding of battery life should be based on the understanding of battery structure.

  That is to say, in the process of charging and discharging, the less lithium ions participate in the movement every time, the less damage to the structure; The slower the lithium ion running every time, the less damage to the structure. If the lithium ion runs almost, it is necessary to "deeply discharge" and continue to extract lithium ion from it, which will damage the battery.

  Do you want to end charging immediately when the battery is full?

  No need! Batteries have "overcharge protection"

  When charging a mobile phone, Netcom should immediately stop charging when the battery is charged to 100%, otherwise it will damage the battery life.

  In this regard, Wang Yonggang said, don’t worry too much. Lithium batteries are generally equipped with "overcharge protection". When the battery is almost full, it will automatically switch to trickle charging, that is, the charging is very slow and the current is very small. When the battery is fully charged, it will automatically cut off the power and will not continue to overcharge, so it will not have much impact if it is rushed to 100% at one time.

  Many people like to charge their mobile phones overnight before going to bed. In this regard, Wang Yonggang said that turning on their mobile phones at night will also cause power loss, and how much power is consumed, the charger will continue to charge the mobile phones with small current. "But such a long cycle will have a certain impact on battery life."

  Will sporadic charging damage the battery?

  Wrong! "Shallow charge and shallow discharge" is good for batteries.

  "Generally, the life of a lithium-ion battery can reach hundreds of charge and discharge cycles. The charge and discharge cycle here refers to the process of using up the electricity and then recharging it, rather than plugging the battery into a charger and then unplugging it once." Wang Yonggang said that "shallow charging and shallow discharging" of lithium-ion batteries, that is, sporadic charging, has little influence on the structure of anode and cathode materials, but will not affect the service life. "So, we usually emphasize that the charging and discharging of lithium-ion batteries should be shallow, and don’t challenge the ‘ Limit ’ 。” Zhang Hua said.

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  These practices also affect battery life.

  Charging different models of mobile phones with non-original charger has its own matching charger. Using non-original charger may have an irreversible impact on battery performance due to the large current of the charger used.

  Making phone calls, playing games and watching videos while charging are all high current consumption. The current provided by the charger is less than the current consumed by the mobile phone, so it is necessary to output current from the battery while using the mobile phone while charging. That is to say, at this time, the battery is not charging, but discharging, and even the battery capacity will be "exhausted" quickly. The life of lithium battery is closely related to the number of charge and discharge cycles. When using the mobile phone while charging, the battery will switch between charge and discharge rapidly, which will affect the service life of the battery.

  When the mobile phone is placed in a high and low temperature environment, due to the instability of the electrodes in the electrolyte, the two electrodes of the battery will react chemically every time they are charged and discharged, and then the active substances will be consumed, and the chemical energy converted into electric energy will be reduced, and the battery capacity will be reduced. If the ambient temperature is too high, it will accelerate the chemical reaction and "self-discharge" of the battery and reduce the battery capacity; The low temperature below zero will also have a negative impact on the battery structure, even permanent damage.