According to Battery.com.cn, in order to improve the battery life of their mobile phones, the battery will be "revived full of blood" in a faster place, and the users will have a "coup". One of the most popular tricks on the Internet recently is to switch the phone to flight mode, which is twice as fast as in normal mode. At the same time, the Internet also circulates "release mobile phone backup power", "use ice to improve the storage capacity of old batteries", etc. Are these true? Xiaobian has to do experiments to distinguish between true and false.
Release the mobile phone backup electric command, the phone does not understand
Network rumors: "When the phone is out of power, just enter *3370# on the dial pad, dial out, the phone will restart, you will find that the battery is 50% more."
Xiaobian experiment: Xiaobian on the above iPhone4, Samsung S4, Lenovo A288T mobile phone, respectively, type "*3370#" command on the dialing keyboard, the mobile phone displays "An error occurred while executing the request, unknown error".
Professional interpretation: Experts say that there is currently no such order to release battery backup power. This "*3370#" command mode is more like the early mobile phone coding method, and it should not be an instruction for the battery. Today's iOS and Android systems commonly used in smartphones do not use this type of encoding.
Flight mode does not allow the charging speed to "fly"
Network rumors: "Turn your phone to flight mode, which is twice as fast as in normal mode."
Xiaobian experiment: In order to improve the accuracy of the experiment, Xiaobian prepared 3 mobile phones: 1 iPhone4 for more than 3 years, Samsung S4 for less than 3 months, and a purchase for more than 1 year but basically Lenovo A288T is not used very much.
Test method: In the normal mode, first charge 3 mobile phones in 20 minutes. Then turn all three mobile phones into flight mode and charge for 20 minutes.
Test results: iPhone4 increased power by 20% in normal mode and 20% in flight mode; Samsung S4 increased power by 20% in normal mode and 21% in flight mode; Lenovo A288T is common In mode, the power is increased by 18%, and in flight mode, the power is increased by 19%.
From the results of the three sets of tests, it is not difficult to see that in the flight mode, even if the charging speed can be accelerated, the number is not much, and the "double speed" of the network transmission is even worse.
Professional Interpretation: What is the difference between charging in the airplane mode and the normal mode? Professor Zhang Junliang, director of the Fuel Cell Research Institute of Shanghai Jiaotong University, said that the flight mode is nothing more than blocking the operation of some programs, thus reducing power consumption. . If you are charging in normal mode, the fewer programs you are running, the closer the test results will be to the flight mode. Because there is no essential difference between the flight mode and the normal mode in terms of charging itself.
An engineer working in a battery factory also said: In fact, the most power-hungry smartphone is the screen, and the flight mode does not turn off the screen. Therefore, when charging, the screen of the mobile phone is always off and the charging speed is also accelerated. In addition, he added that the speed of the mobile phone is determined by the maximum current output of the charger. In the range of the maximum milliampere value that the mobile phone can withstand, the charger output power is large and the charging speed is relatively fast.
The battery was frozen for 3 days and 3 nights, only 2 hours for extended standby.
Network rumors: "Put the phone battery into the refrigerator, freeze it for a certain period of time, and then take it out and continue to use it. The battery life is longer than before!"
Xiaobian experiment: After unloading the battery of Lenovo A288T mobile phone, seal it with plastic wrap and put it into the refrigerator. After 72 hours, remove the battery from the refrigerator, after cooling for a while, fill the battery into the phone and turn it on. For the first time, the standby time of the mobile phone was indeed extended by 2 hours; after recharging, the standby time was restored to the state before being placed in the refrigerator.
Professional interpretation: Zhang Junliang said that the current mobile phones are basically using lithium batteries. If the number of times of charging is large, the internal molecular arrangement microstructure will be gradually destroyed, which will result in the endurance of the mobile phone after using for a certain period of time. Getting worse. At high temperatures, the irreversible chemical side reactions of the electrode material and electrolyte inside the cell phone battery will accelerate and reduce the battery life, but the low temperature refrigeration has no ability to repair the microstructure. "The freezing method is not scientific," the professional stressed that the refrigerator is unlikely to bring the old battery back to life. At the same time, it is pointed out that if it is a mobile phone that has not been used for a long time, it is really necessary to remove the battery and store it at a low temperature, which can extend the life of the battery. According to relevant experimental data, the optimal storage conditions for lithium batteries are 40% charge and storage temperature below 15 degrees Celsius.
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