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Today's smart phones, communication, payment, entertainment, work and many other functions, all gathered in such a small "long square", we can go out without anything, except for mobile phones, because without mobile phones is really difficult to move an inch.
However, whether it is a smartphone or other electronic devices, they are facing a problem is the battery, I believe everyone has experienced the despair of the mobile phone is about to run out of power, the battery is like the heart of the mobile phone, and the mobile phone will become a scrap metal without electricity.
Therefore, when many people buy a mobile phone, they will deliberately choose a large-capacity battery, but at the same time, we must also protect the battery well, so that the battery can last longer.
Then the question is, how to charge it correctly, whether to charge it when half of the power is left, or to recharge it when the battery is almost out of power.
What are the batteries?
To know the correct charging method, we must first understand the nature of the battery, because different types of batteries have different charging methods.
We are all familiar with batteries, batteries can be divided into primary batteries and secondary batteries, the so-called primary batteries, is the batteries used in flashlights, clocks and some gadgets.
Once these batteries are used up, they lose their value and end up in the trash.
The secondary battery is the rechargeable battery we commonly use now, and it can be charged again after the power is used up.
Nowadays, we use this kind of battery in our mobile phones, of course, there are many kinds of secondary batteries, including nickel-cadmium batteries, nickel-hydrogen batteries and lithium batteries, etc.
Among them, the first battery used in mobile phones is the nickel-cadmium battery, and its representative work is the big brother that swept the streets and alleys in the seventies and eighties of the last century.
Although this kind of battery is cheap and cheap, it has an obvious disadvantage, that is, it is large and heavy, and the integrated circuit and battery technology at that time are not mature enough, so half of the big brother is a battery, and the weight is more than a kilogram, a proper big brick.
And nickel-cadmium batteries also have a feature, that is, the "memory effect", that is, the first charge, if it is not fully charged, it will be used, then the battery capacity will stop at that position.
For example, when charging once, there is still 30% of the power, then the battery will be fixed at 7% after charging.
This is why many people say that after buying a new mobile phone, you must use up the power and recharge, and it must be fully charged.
After the 90s, the construction of 2G network began, and at the same time, integrated circuit technology has also been unprecedentedly developed, in order to seize more markets, major mobile phone manufacturers began to think about how to make mobile phones smaller and easier to carry.
As a result, the second-generation mobile phone battery nickel-metal hydride battery came into being, compared with the first generation of batteries, nickel-metal hydride batteries are much smaller and lighter.
But the most important thing is that the nickel-metal hydride battery no longer has a significant "memory effect", and on the basis of a 15% weight reduction, the call life can be increased by 30-60 minutes.
However, this kind of battery still has obvious disadvantages, nickel-metal hydride batteries are very taboo to overcharge, because this will cause the battery to heat up, and then swell, greatly shortening the battery life.
As for today's mobile phones, it is a lithium-ion battery that is superior to the previous two batteries, which actually came out as early as the 90s of the last century, but did not cause an enthusiastic response, and it was not until it was later used as a laptop by Dell that it attracted attention.
This kind of battery has many advantages, first of all, it is green and environmentally friendly, and secondly, it is smaller and lighter, has higher energy density, and does not have a memory effect, so lithium-ion batteries are also called "21st century batteries".
Lithium-ion batteries can be charged and discharged at any time, and the battery life can reach several hours or even days on a single charge, but because the performance of mobile phones is too much, coupled with the acceptance of data networks, the power of mobile phones is still insufficient.
Especially now that the mobile phone battery is not removable, a new question was born, that is, what is the correct way to charge?
How to charge it properly?
Although lithium batteries do not have a "memory effect", unreasonable charging methods will still shorten the battery life.
For lithium batteries, there is no need to drain the battery and then charge it, which will cause damage to the battery, generally speaking, when the battery is less than 50%, you can consider charging.
But in this way, it is equivalent to using half of the power, which shortens the battery life of the mobile phone in disguise, which will make us very inconvenient to use, and frequent charging and discharging also has a certain loss of battery.
So we can charge before the battery level drops below 20%, which not only ensures the battery life, but also protects the battery life.
In fact, in addition to the charging method, there are two behaviors that are the real loss of battery, one is that many people like to put their mobile phones at the bedside to charge before going to bed at night, because in this way, the mobile phone is fully charged when they wake up in the morning.
Although most mobile phones will start battery protection after being fully charged, they will accelerate the aging of the battery if they are under high voltage for a long time.
We can choose to charge it before going to bed, and if it is not full, we can charge it appropriately in the morning.
And when we charge, it is best to choose the original charger, although the price of the copycat charger is a little cheaper, but the voltage and current when it is charged are likely to be unstable, which is the real battery killer.
In addition, it is also taboo to play with the phone while charging, you will find that if you also frequently use the phone to watch TV or play games while charging, then the mobile phone battery will heat up.
The optimal temperature for lithium-ion batteries is 10 to 45 degrees Celsius, and if the temperature is too high, the structure of the battery will change, resulting in a sharp decrease in battery life.
epilogue
Mobile phone batteries will maximize their life when used correctly, but with time, it is inevitable that the battery will get old, so we should look at this problem correctly.
As a consumable, we should make ourselves more comfortable to use on the premise of ensuring safety.