There was once a joke on the Internet, “Men who use iPhones are good men because they have to go home and charge them every day.” This actually points to a problem faced by almost all smartphones – short battery life. In order to improve the battery life of their mobile phones and allow the battery to “resurrect at full capacity” more quickly, users have come up with unique tricks.
One of the “strange tricks” that has been widely circulated recently is that putting your phone in airplane mode can charge twice as fast as in normal mode. Is it really? The reporter conducted a field test and the results were not that optimistic.
At the same time, reporters also conducted experiments on rumors circulating on the Internet about “releasing the backup power of mobile phones” and “using ice to improve the storage capacity of old batteries.” Both experimental results and professional analysis have confirmed that most of these rumors are unreliable.
Airplane mode cannot “fly”
Internet rumor: “If you put your phone in airplane mode, it will charge twice as fast as in normal mode?”
Professional interpretation: Professor Zhang Junliang, director of the Fuel Cell Research Institute of Shanghai Jiao Tong University, said that flight mode is nothing more than preventing some programs from running, thereby reducing power consumption. If there are fewer programs running when charging in normal mode, the test results will be closer to those in airplane mode. Because as far as charging itself is concerned, there is no essential difference between airplane mode and normal mode.
Luo Xianlong, an engineer working at a battery factory, agrees with Zhang Junliang. He told reporters that in fact, the screen is the most power-consuming part of smartphones, and airplane mode cannot turn off the screen. Therefore, when charging, ensure that the screen of the phone is always turned off, and the charging speed will be accelerated. In addition, he added that what determines the charging speed of mobile phones is actually the maximum current output power of the charger. Within the maximum milliamp value range that the mobile phone can withstand, the charger with high output power will charge relatively quickly.
The mobile phone “listens” and does not understand the backup power command
Internet rumor: “When the phone is out of power, just enter *3370# on the dial pad and dial out. The phone will restart. After the startup is completed, you will find that the battery is 50% more?”
Professional interpretation: Engineer Luo Xianlong said that there is no so-called instruction to release battery backup power. This “*3370#” command mode is more similar to the early mobile phone coding method, and it should not be a command for the battery. Nowadays, the ios and Android systems commonly used in smartphones no longer use this type of encoding.
Frozen batteries cannot increase power
Internet rumor: “Put the mobile phone battery in the refrigerator, freeze it for a certain period of time, and then take it out and continue to use it. The battery will last longer than before freezing?”
Professional interpretation: Zhang Junliang said that today’s mobile phones basically use lithium batteries. If they are charged too many times, their internal molecular arrangement microstructure will gradually be destroyed, which will cause the battery life of mobile phones to deteriorate after a certain number of years of use. get worse. At high temperatures, damaging and irreversible chemical side reactions between the electrode materials and electrolyte inside the mobile phone battery will accelerate, reducing the battery life. However, low-temperature refrigeration does not have the ability to repair the microstructure.
“The freezing method is unscientific,” Luo Xianlong emphasized. It is impossible for a refrigerator to bring old batteries back to life. But he also pointed out that if the mobile phone is not used for a long time, the battery should be removed and stored at low temperature, which can extend the life of the battery.
He said that according to relevant experimental data, the best storage conditions for lithium batteries are that the charge level is 40% and the storage temperature is lower than 15 degrees Celsius.
Post time: Dec-29-2023