This is more damaging to the battery and more dangerous than charging it overnight!

Audit expert: Wang Jinlu

Shenzhen Lingkang Technology Co., Ltd., the power supply R&D director was out shopping when his phone suddenly showed less than 20% battery, so he had to look for a power bank everywhere; he was watching videos enthusiastically, but was prompted to charge immediately... These scenes have become the norm in modern people's lives as people become more dependent on mobile phones. People have also found that the battery health of old phones is always not as good as that of new phones, so how can the battery of mobile phones be maintained for a "super long standby"?

Source: unsplash

Factors affecting mobile phone charging

We all know that mobile phones need chargers to charge. The charger consists of a charging head and a data cable. The charging head is the output side of the current. In order to protect charging safety, the mobile phone has a power management chip (charging protocol) for support and identification to select the appropriate current and voltage for charging. Observe the charging head, which is marked with current and voltage output data. For example, 5V/2A means that the maximum carrying current of the interface is 2A. When the charger voltage is 5V, the charging power is 10W. If the original charging head of the mobile phone is broken, we need to check whether the charging head is compatible with the charging protocol of the mobile phone when choosing other chargers.

Some charger protocols

The charging time and charging power of a mobile phone are closely related. When the output current and voltage change, the power will also change accordingly. In recent years, lithium-ion battery fast charging technology has been in full swing, which can increase the power to 100% in a short time. Fast charging technology requires an adaptive fast charger and fast charging protocol. The mainstream fast charging protocols include SCP protocol, QC3.0 protocol, VOOC flash charging protocol, MTK PE protocol, etc., which greatly improves the charging power. Before turning on fast charging, the mobile phone and the fast charging charger need to be matched. Only when the match is successful can the fast charging function be turned on, otherwise only ordinary slow charging is supported. Ordinary charging technology can only charge 25% of the power in 30 minutes, while in the same time, fast charging technology can charge 60% to 80% of the power.

Source of lithium-ion batteries｜A shopping website

Are you still charging your phone overnight? These behaviors are shortening your battery life

In life, we often see such news, chargers catching fire or batteries exploding and causing fires, and such accidents often occur when people are asleep. Under normal circumstances, our charging is safe. First of all, most mobile phones currently use lithium batteries, which are very "adaptable". When a short circuit or overcharging occurs, the lithium battery will automatically cut off the battery circuit; when the internal pressure of the battery is too high, it can trigger the exhaust pressure relief device to reduce pressure; when the battery temperature is too high, it will trigger the hot melt protection device to terminate the electrochemical reaction. Secondly, generally qualified chargers will turn on the protection function to prevent overcharging, or automatically stop charging, or reduce the charging current to a very small range after the battery is fully charged.

Source: unsplash

Therefore, if you use an original adapter charger, even if you charge overnight, in theory, it will not harm the mobile phone battery. However, using a non-original charger and charging cable may have an irreversible effect on battery performance. Since the mobile phone will identify the charging cable and charger model through the charging protocol, and select the appropriate current for charging, if it is not compatible, the actual charging current is a default value, which is related to the output specifications of the charger and the specifications of the charging cable. When the default current value is not suitable for charging the mobile phone battery, it will be dangerous to charge for a long time.

Someone once did a set of comparative experiments, using three different brands of mobile phone chargers and charging cables to charge. The results showed that the low-current charger was slow when charging the high-current mobile phone, and the charger would overheat when under load for a long time, accelerating the loss of battery capacity and even causing fire or explosion.

Source: See watermark

Playing with your phone while charging will also accelerate the battery's "death". Making phone calls, playing games, watching videos and other activities are all high current consumption, far greater than the current provided by the charger. Using your phone while charging means that the battery is rapidly switching between the charging and discharging states. The life of a lithium battery is closely related to the number of charge and discharge cycles, and such switching will affect the battery's service life.

Placing the phone in an environment with too high or too low temperature is also very detrimental to the health of the battery. Electrodes are unstable in the electrolyte. When charging and discharging occur, chemical reactions occur at the two electrodes of the battery, the active substances are consumed, the chemical energy converted into electrical energy decreases, and the battery capacity also decreases. Therefore, when the ambient temperature is too high, it will accelerate the chemical reaction and "self-discharge" of the battery, reducing the battery capacity; low temperatures below zero will also have a negative impact on the battery structure, or even permanent damage.

Scientific charging method, learn it now. Now that you know the unscientific charging method, how can you charge your mobile phone scientifically and effectively?

1. Ensure reasonable power value

When the battery is out of power and the phone is turned off, you should say no to charging it in a hurry. When the battery is completely exhausted, charging the phone is called "deep discharge", which causes great damage to the battery. It is more appropriate to keep the battery power ratio between 65% and 75%. If the battery power ratio of the phone is kept within this range for a long time, the battery life will be the longest.

2. Use a suitable charger

When charging, it is best to use the original charger of the mobile phone. If the original charger cannot be used and the mobile phone needs to be charged, then when choosing a charger, you must pay attention to whether the output specifications of the charger meet the battery requirements, and also pay attention to whether the maximum current that the charging cable can support is compatible with the mobile phone battery.

Source: pexels

3. Pay attention to the charging status of your phone

When charging, try to forget about games and videos, and let the phone "beautiful alone". Playing while charging will not only reduce the charging efficiency, but also may cause the phone to heat up. Therefore, when charging, you can often feel the body temperature with your hands. Once you find that the temperature of the phone is rising too fast or too high, you can unplug the power supply in time and stop charging.

When mobile phones first appeared, low battery was not a worrying problem. Charging once a day or every few days could meet daily needs. With the emergence of portable electronic products, such as smartphones, new requirements have been put forward for mobile phone batteries. The powerful functions of mobile phones also lead to rapid consumption of electricity, and carrying a power bank with you has become a standard. However, don't forget the damage caused to the battery by unreasonable charging methods. Only reasonable and scientific charging can achieve the dual goals of safety and efficiency.