Correct charging method for cell phone lithium battery

1. Lithium batteries, whether used or not, have a "shelf life" of 3 years and decay quickly after 3 years. And the other is full church, which I'm not going to explain any more, which decays quickly after about 400-500 times. Just see if you use it for 3 years or the number of times you get it first.

2. In addition to being afraid of low power, lithium batteries are also afraid of overheating, especially when charging. If your sleeve is poorly heated and hot when charging, it is best to take it off when charging. Lithium-ion batteries are stored in the refrigerator after charging to 40 %, but do not freeze.

3. Don't wait until the electricity runs out to recharge, which will accelerate its loss. Lithium batteries lose a lot when they are low in power, and can live as long as 40-60 % of the time, but this is impossible for commonly used devices, but you can always keep it at 100 %, that is, often charging. We're done. It won't overcharge, and it's powered by electricity, and the battery won't waste chargecyce, so it's good for life. You only need to fill it once a month to calibrate the battery scale. 4. You can use it when charging. Some people say that using it when charging will cause the charging to be slow. Is the battery charging while discharging? No, there are two circuits in the phone, one to charge the battery and the other to power the machine directly through AC. Charging is slow because part of the current is used by the machine, so the charging current is smaller, especially when the USB charges because the current itself is small. However, it is worth noting that slow charging with small currents is the preferred charging method for lithium batteries, which produces less heat and is more conducive to its life span. Also, do not use games or other heavy loads while charging! The reason is not that the power consumption is large, but that the same 2 will produce large amounts of heat, thereby reducing the battery life. General on the Internet, sending information is no problem, long time in the hands of the phone is not good, it is recommended to use headphones.

4. After charging, it will not cause any harm to the battery, because it is directly powered by the power supply, which reduces the number of charges and also helps to extend the battery life. A lot of people would argue that my laptop was plugged in and the battery was gone a year later. Notebooks, unlike mobile phones, are often caused by heat, poorly heated notebooks, and battery life drops quickly, even if you don't use it. If you keep playing games with the power, you may overheat your phone because of the heat generated by the power supply. This is not good. As long as it is not hot, there will be no problem. You can always plug in the power supply until you go out. "I think safety is the most important thing, and someone to look after is the best."

5. It is also not good to always charge the power when the battery is above 90 % but below 100 %, that is, always "top ping off". Think pad's notebook has a mechanism that allows the battery to remain uncharged at more than 90 %. If the phone also has a charging switch, we can safely use the power for a long time. There is no problem with the battery charging continuously at 20-80 %.

6. There's no harm in charging overnight, because you're not using it. It doesn't produce heat. Individuals think that overcharging is never a good thing. It is best not to charge at night. In some areas, the voltage is unstable at night and is harmful to the machine!

The use of lithium ion batteries, note three points:

1, how to charge the new battery

In the use of lithium batteries, it should be noted that after the battery is placed for a period of time, it enters a dormant state. At this time, the capacity is lower than normal, and the service time is also shortened. However, the lithium battery is easily activated, as long as it passes through 3-5 times. The normal charge and discharge cycle can activate the battery, Restore normal capacity. Due to the characteristics of the lithium battery itself, it has almost no memory effect. Therefore, the new lithium battery in the user's phone is activated during the activation process. Natural activation is the best way to charge from the start.

For the "activation" of lithium batteries, there are many arguments: The charging time must be more than 12 hours, repeated three times to activate the battery. This "the first three charges must be charged for more than 12 hours." It is obviously a continuation of nickel batteries(such as nickel cadmium and nickel hydrogen). So this statement can be said to be a misrepresentation at the beginning. There is a very large difference between the charging and discharging characteristics of lithium batteries and nickel batteries, and it can be very clear to everyone. All the serious and formal technical information I have consulted emphasizes that overcharging and over discharging can cause tremendous damage to lithium batteries, especially liquid lithium batteries. Therefore, charging is best done in accordance with standard time and standard methods. In particular, do not carry out more than 12 hours of ultra-long charging. Usually, the charging method described in the mobile phone manual is a standard charging method suitable for the mobile phone.

In addition, the lithium battery phone or charger will automatically stop charging after the battery is filled, and there is no so-called "trickle-down" charge of the nickel charger that lasts for more than 10 hours. That is, if your lithium battery is filled, It is also a blank charge on the charger. Neither of us can guarantee that the characteristics of the battery's charge-discharge protection circuit will never change and the quality will be foolproof, so your battery will be on the edge of danger for a long time. This is another reason to oppose long charging.

In addition, after charging some mobile phones for a certain period of time, if the charger is not removed, the system will not only stop the charging, but will also start the discharge-charging cycle. Perhaps the manufacturer of this method has its own purpose. At the same time, long recharging takes a long time and often takes place at night, and in many places the voltage is higher at night, according to our electricity grid. Lithium batteries are delicate, as we have said before, and they are much less resistant to fluctuations in charge and discharge than nickel, which poses additional risks.

In addition, another aspect that can not be ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also very unfavorable to lithium batteries.

2, when should the charging start in normal use

Under normal circumstances, you should be recharged on a reserved basis following the principle that the battery is used up and recharged, but if your battery should start charging in time when you expect it will not be possible to last the entire day on the second day, Of course, if you are willing to carry a charger to the office again.

And when you need to recharge to cope with an important event that is expected to lead to busy communication, even when the battery has a lot of power, then you just charge in advance because you don't really lose "1" charge cycle life. That is, "0.x" times, and often this X will be very small.

The principle of using up the remaining battery power is not to ask you to go to extremes. A saying that is as widespread as long charging is that "try to use up the battery power of the mobile phone, and it is best to use automatic shutdown." This is actually just a nickel battery practice. The purpose is to avoid the memory effect. Unfortunately, it is also circulating on lithium batteries. After the warning that the cell phone battery is too low, It still does not charge and continues to use the example that has been used until the automatic shutdown. As a result, the mobile phone in this example did not respond to the subsequent charging and booting, and had to be sent to the customer service for inspection. In fact, the battery was due to excessive discharge. Low voltage, So that there is no normal charging and boot conditions caused.

3. The correct approach to lithium battery phones

In summary, the most important reminder of the charging and discharging problem of lithium battery phones in use is:

1, according to the standard time and program charging, even if it is the first three times to do so;

2, when the mobile phone electricity is too low prompt, should start charging as soon as possible;

Lithium battery activation does not require a special method. Lithium batteries will naturally activate during normal use of mobile phones. If you insist on using the "first three 12-hour long charging activation" method, it will not actually work.

Therefore, all the pursuit of 12 hours of super long charging and the use of lithium battery phone automatic shutdown is wrong. If you have done this before, please correct it in time, perhaps it is not too late.

Of course, the protection of lithium batteries is quite guaranteed when the mobile phones and chargers themselves protect and control circuits are of good quality. Therefore, the understanding of charging rules is the focus. In some cases, you can also make some concessions. For example, if you find that your phone must be charged before you go to bed at night, you can also start charging before bedtime. The key to the problem is that you should know what is right. And don't deliberately follow the wrong line.

In general, when a mobile phone is bought, it will have some electricity. Because lithium batteries have a certain amount of electricity at the factory, they can be used immediately, not necessarily before charging. From the point of view of theory and practice, the effect of "recharging" or "recharging" for the first time is exactly the same for lithium batteries. Here is a limit, the factory date to reach more than six months of the best first charge, because the electricity is too low at this time. Some lithium batteries have the first three lithium batteries. Cell phone lithium batteries are activated on batteries. In fact, these activations do not need to be done deliberately. After the first three times of charging and discharging, mobile phone lithium batteries and lithium batteries basically return to their best state. Lithium cells can be removed from the charger when the lithium battery pack is fully charged for the first time. Because there is no "activation" problem when the lithium cell is first used, the charging and discharge characteristics of lithium cells and nickel-metal hydrogen cells are very different. If overcharging causes great damage to lithium cells, lithium batteries, and lithium cells during the cycle life, charging the battery continuously will cause excessive overcharging of the battery. When the lithium battery is first charged, after filling, the lithium battery is separated from the charger. Lithium batteries will be automatically stopped after being filled(temporarily) because lithium batteries have PMC protection and there is no "continuous" long stream charging. This is the difference between lithium batteries and nickel-metal hydride batteries. So, we need to be careful when charging.

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