3 incorrect charging habits will speed up the battery's failure! Check yourself →

While shopping outside, the battery level of your mobile phone suddenly shows less than 20%, and you have to look everywhere for a power bank; when you are watching videos, you are prompted to charge immediately... These scenes have become the norm in modern people's lives as people become more and more dependent on mobile phones.

People have also discovered that the battery health of old mobile phones is always not as good as that of new ones. So, how can we maintain the "super long standby" of mobile phone batteries?

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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 of current. In order to protect charging safety, there is a power management chip (charging protocol) on the mobile phone to support and identify it, so as to select the appropriate current and voltage for charging.

Observe the charging head, which has current and voltage output data marked on it, for example, 5 V / 2 A, which means the maximum current carrying capacity of the interface is 2 A. When the charger voltage is 5 V, the charging power is 10 W. 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.

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The charging time of a mobile phone is closely related to the charging power. When the output current and voltage change, the power will also change accordingly. In recent years, lithium-ion battery fast charging technology has been gaining popularity, which can increase the power to 100% in a short time.

Fast charging technology requires compatible fast chargers and fast charging protocols. The mainstream fast charging protocols include SCP protocol, QC 3.0 protocol, VOOC flash charging protocol, MTK PE protocol, etc., which greatly improves the charging power.

Before turning on fast charging, the phone and the fast charging charger need to be matched. Only when the matching is successful can the fast charging function be turned on, otherwise only ordinary slow charging is supported. Ordinary charging technology can only fully charge 25% of the power in 30 minutes, while fast charging technology can fully charge 60% to 80% of the power in the same time.

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Are you still charging your phone overnight?

These actions are shortening battery life

In our daily lives, we often see news about fires caused by chargers catching fire or batteries exploding. These accidents often occur when people are sleeping.

Normally, our charging is safe. First of all, most mobile phones use lithium batteries , which are very adaptable. When a short circuit or overcharge 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 the pressure; when the battery temperature is too high, it will trigger the hot melt protection device to terminate the electrochemical reaction.

Secondly, generally, a qualified charger will turn on a protection function to prevent overcharging after the battery is fully charged, or automatically stop charging, or reduce the charging current to a very small range.

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Therefore, if you use an original adapter charger, even if you charge it 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 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. This value 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, charging for a long time will be very dangerous .

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.

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Playing with your phone while charging will also accelerate the death of the phone battery. Activities such as making phone calls, playing games, and watching videos consume large currents, which are far greater than the current provided by the charger.

The behavior of using a mobile phone while charging means that the battery quickly switches between the charging and discharging states. The life of a lithium battery is closely related to the number of charge and discharge cycles. Such switching will affect the battery 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 is reduced, 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 cause permanent damage.

Scientific charging method, learn it now

Now that we know the unscientific charging method, how can we charge our mobile phones scientifically and effectively?

1. Ensure reasonable power value

When the battery is dead and the phone is turned off, you should say no to the urgency to charge it. When the battery is completely exhausted and then charged, it enters "deep discharge", which causes great damage to the battery.

The battery charge ratio should be kept between 65% and 75% , which is more appropriate. If the battery charge ratio of the mobile 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.

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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 and mobile 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 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.

Review | Wang Jinlu Shenzhen Lingkang Technology Co., Ltd., Power Supply R&D Director

Source: Digital Beijing Science Center

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