How to use and maintain the lithium battery of mobile phone

In the daily use of mobile phones, we will have such problems or problems, but the attention of mobile phone batteries is obviously not as good as our love for mobile phones. The editor’s beloved mobile phone N85 has frequently appeared automatic shutdown phenomenon. This is a problem that we encounter when using our mobile phone every day, but the battery is obviously not as concentrated as we are on the phone. Editing the beloved N85 phone, which is often automatically switched off, found that it was caused by the aging of the phone's lithium battery and the unscientific use of the phone's battery. It seems that the daily care for mobile phones while the focus on batteries should also attract enough attention.

1. Nickel cadmium battery (nickel cadmium)

The earliest notebook computers used nickel-cadmium batteries (nickel-cadmium). Because the battery technology was not advanced enough at the time, nickel-cadmium batteries had many headaches, such as: large size, heavy weight, small capacity, short life, and memory. Effects, etc. (I give the impression that there is nothing wrong with it). These are undoubtedly contrary to the light and fast performance that notebooks pursue. At present, nickel-cadmium batteries have been eliminated, notebooks have also broken with nickel-cadmium, and it is not necessary to mention it.

2. NiMH battery (nickel)

Nickel-metal hydride batteries are currently the most environmentally friendly batteries. Environmentally-friendly countries strongly advocate the use of nickel-metal hydride batteries because they are easy to recycle and have minimal environmental damage. However, nickel-metal hydride batteries have some disadvantages compared with lithium batteries. Long charging time, heavy weight, smaller capacity than lithium battery, and memory effect. Although its memory is not as large as that of a nickel-cadmium battery, it still needs to be discharged. Users must use it up and recharge it. However, nickel-metal hydride batteries can be charged more than 700 times, and some good quality products can be charged and discharged up to 1200 times, which is longer than lithium batteries and the price is very popular.

3. Lithium battery (Li), lithium ion battery (Li-ion), polymer lithium secondary lithium ion battery (Li-polymer)

Lithium-ion batteries have been around for a long time. At the time, it was not safe to use. It often burned and burst when charging. This may be because lithium is too active. Later, a modified lithium-ion battery (lithium) was added to a component that inhibits the activity of lithium. It is an alternative to a lithium battery. Its anode uses a carbon electrode capable of absorbing lithium ions. When discharged, lithium becomes Lithium ions, off the battery anode, reach the cathode of the lithium ion battery. At the time of charging, lithium atoms in the cathode are ionized into lithium ions and electrons, and lithium ions move toward the anode to synthesize lithium atoms with electrons. During discharge, lithium atoms are ionized from the anode surface of the graphite crystal into lithium ions and electrons, and lithium atoms are synthesized at the cathode. Therefore, in the battery, lithium always appears in the form of lithium ions and does not appear in the form of metallic lithium. Of course, there will be no danger of burning, explosion, etc. Lithium ions move between the anode and the cathode, and the electrodes themselves do not change. This is the essential difference between a lithium-ion battery and a lithium battery. Therefore, the lithium battery is truly safe, efficient and convenient, and the old lithium battery is also eliminated. The method of distinguishing them is also quite simple: it can be identified from the battery's logo, the lithium battery is labeled Li, and the lithium-ion battery is lithium ion (N85 or even most mobile phones are lithium batteries, the full name is lithium-ion batteries). A polymer lithium secondary lithium ion battery (Li-polymer) means that at least one or more of the three main structures use a polymer material as a main battery system. In terms of shape, the polymer lithium secondary lithium ion battery has many advantages such as thinner, arbitrary area and arbitrary shape. and thus can be made into a battery of any shape and capacity in accordance with product requirements. In terms of thickness, the thickness of the polymer lithium secondary battery is about 2 to 4 mm, and the current minimum thickness of the lithium ion battery is 6 mm, which can be reduced by at least about 50%, and the minimum thickness that can be achieved is about 0.5. Millimeter.

The following is a question about the maintenance of the mobile phone lithium battery (lithium ion battery) around us, and also to correct some of the wrong practices used in other battery maintenance.

1. First got a new battery, the practice of many users is to follow the tips of the merchant in the first three times of the lithium battery used to charge 12 small electric or even more. There is a lot of controversy on this Internet, but I found in actual use that in fact, this is not necessary for lithium batteries. Why? The merchant said that this was done to fully activate the battery's activity and completely wake up the new battery. It sounds like this reason is very full and credible, but have you ever thought about it? If the mobile phone battery has not been fully activated by the manufacturer, such a product can be said to be only a semi-finished product. It is impossible to require every user to master the technique of activating the battery, and it is impossible in reality. Therefore, the battery has been fully activated by the manufacturer before leaving the factory. So calling the user to charge 12 hours is good for battery use? No! I give a negative answer here, the current N95 body and brand power have a complete power management circuit and charge management system, when the battery reaches saturation The control circuit automatically switches to the short-circuit state, so the later time is just a waste of time. When you are charging, you will notice that when the phone is fully charged, the phone will “drop” a prompt, then it will not be charged anymore, and it will be inserted in white. How can I activate the battery's activity? In fact, the manufacturer's activation of the battery is to charge and discharge the battery for a long time without overload protection. Therefore, it is unnecessary to charge 12 small batteries for the first three times.

2. Again, many users are very confused about the use of the battery, and it should not be charged until the battery is completely exhausted. The answer to this question should be like this. If you can do this, it is definitely a good thing, but the premise is that you are not too troublesome. Of course, what I said here is not meant to be over-discharged. Practice has proved that over-discharge is definitely harmful to the battery. It will shorten the battery life. (There is software that relies on vibration or screen brightness to discharge the phone, which is in battery maintenance. It is not advisable). So when the phone has two or one grid, you can charge it at the right time. Some merchants have repeatedly stated that their lithium batteries have no memory effect (this is also the idea of ??universal machine friends), this is a very irresponsible performance, so when your battery has more power, do not charge as well. Because the memory effect does exist, even a little, the impact is far-reaching. It is recommended to have a full discharge charge once a month.

3. Let's talk about the daily charging problem. When using lithium battery, don't pay attention to what is enough. The test in many places shows that it is harmless. Generally, you should not use the battery when the power is insufficient. Just charge one or two grids and you can charge it. It is suitable for 2 hours. The normal charge of the N85 is enough to be fully charged in two hours. The Momax I mentioned before is about 50 minutes to an hour. Do not exceed 5 hours, otherwise it will be harmful to the battery. If you charge more than 12 hours, the battery life and power will be greatly reduced, and the standby time will be reduced. Remember! Although both the N95 and the original power have over-current and leakage protection, some "good" brand chargers and "product" brand power are another matter.

4. Next, let's talk about whether it is necessary to say "it should be fully charged once after one month of use" in the usual lithium battery manual or mobile phone manual. End-cell phones, such as the lithium-ion battery used in the N85, usually have a management chip (state detection) and a charge control (over-current protection) chip. The management chip has a series of registers, which have values ??such as capacity, temperature, ID, state of charge, and number of discharges. These values ??will gradually change during use. I personally think that the main function of the "use should be fully charged once after using one month" in the instructions for use should be to correct the improper values ??in these registers, so that the battery charge control and nominal capacity match the actual situation of the battery. Therefore, such work can not be omitted, after all, the original or brand battery is expensive, we must pay attention to maintenance. But if you have more money and are afraid of fees, then these are for reference only.

5. In the end, talk about how to make your phone's battery last longer. Since you bought a mobile phone, you have to use it. The battery is one of the consumables, and it will inevitably be scrapped with the continuation of the use time. If you don't use it, just take care of it and supply it. After one or two years, it will become an outdated display, which is not worth the candle. As long as you pay attention to the daily use habits of the battery, you can use the battery normally, there is no need to be afraid.

The page contains the contents of the machine translation.