The correct way of charging and using the mobile phone battery

1. Lithium batteries have a "shelf life" of three years no matter used or not and decay quickly after three years. Another theory is full charge cycle, which means the lithium battery decays rapidly after about 400-500 charges. It depends on whether you use it for 3 years or charge it to a specified number of times first.

2. In addition to the fear of low power, lithium batteries are also afraid of overheating, especially when charging. If the protective cover is very poor heat dissipation, it is best to take off the cover when charging. The storage method that lithium battery does not use for a long time is to charge 40% after putting in freezer, but remember not to refrigerate.

3. Don't wait for the power to run out before charging, it will speed up its loss. Lithium batteries lose a lot of energy when they are at low power levels. Staying at 40-60% power for a long period of time can make them live a long time, but this is not possible for frequently used devices. But you can keep it at 100 percent all the time, which is to charge it often and never pull it out. It will not be overcharged, and at this time power is used, and the battery will not waste charge cycle, so it is conducive to extending the life. You only need to fill it up once a month to calibrate the battery gauge.

4. When charging you can use the mobile phone. Some people say that using during charging will lead to slow charging. Is the battery discharging and charging at the same time? Actually, it is not. There are two circuits in the phone, one is to charge the battery, and the other is to power the machine directly through AC. Charging is slow because some current is used by the machine, so the charging current is small, especially when USB is charging, because the current itself is small. However, it is worth noting that low current and slow charging is the preferred charging mode of lithium battery, which generates less heat and is more conducive to its life. Also, don't play games or other heavy loads while charging! The reason is not that it consumes a lot of power, but that doing both at the same time creates a lot of heat, which reduces battery life. It is ok to surf the Internet commonly, send a message, it is bad to hold in the hand for a long time also make a phone call, you had better use earphone.

5. After filling the electricity in the power supply in use will not cause any damage to the battery, because it is through the power of direct power supply, this reduced the charge number but also to extend battery life. Many people will argue that my laptop has been plugged in, the results one year after the battery is finished. Notebook with mobile phone is different, this kind of situation is often caused by heat, heat dissipation is not good laptop and battery life fell sharply, even if you don't have it. If you always play games on the power supply, it may cause your phone to overheat due to the high heat generated by the power supply, which is not good either. In short, as long as you don't overheat, there will be no problem. You can always plug in the power supply before going out. (Personally, I think safety is the priority, and it is best to be looked after)

6. (To discuss) Topping off is also bad when the battery is always above 90% but below 100%. Thinkpad laptops have a mechanism to keep batteries uncharged for more than 90 per cent of the time. If only the phone had a charging switch, we could safely use external power for a long time. It is no problem for the battery to be continuously charged at 20% to 80% of the time.

7. Charging overnight completely harmless, because you are not using it, it won't produce heat. I think overcharge is not good, it is better not to charge at night, some areas at night when the voltage is unstable, harmful to the machine!!

The service life of electrical general is 300-500 charge cycles. If a completely discharge to provide power for 1 Q, if you don't consider charging each cycle after power decreases, the lithium electricity within its life can provide or replenish a total of 300 Q - 500 Q of power. So we know that if you charge 1/2 every time, you can charge 600 to 1,000 times. If you fill it up a third of the time, you can fill it up 900 to 1,500 times. Similarly, if the charging is random, The Times are uncertain. But anyway, no matter how much you charge it, it's going to add up to 300Q minus 500Q, which is constant. Therefore, we can also understand that the life of lithium battery is related to the total charge quantity of the battery, and has nothing to do with the number of charges. The effect of deep discharge and shallow discharge on the life of lithium is not different. So, some manufacturers advertise, "said the propaganda "so-and-so strong lithium batteries, rechargeable more than 1500 times. This is pure deception of consumer ignorance.

In fact, shallow discharge and shallow charge are more beneficial to lithium battery. Only when the power module of the product is calibrated for lithium battery can deep discharge and deep charge be necessary. Therefore, lithium electric power supply products do not have to adhere to the process, everything in order to facilitate the first, charging at any time, do not have to worry about the impact of life.

Note three points for the use of lithium- ion batteries:

1, how to charge a new battery

That should be paid attention to in using lithium battery, battery placed after a period of time to enter a dormant state, capacity is lower than normal at this time, use time is shortened. But the lithium battery is easy to activate, if after 3-5 times the normal charge and discharge cycle can activate cells, back to normal capacity. Due to the characteristics of lithium battery itself, it almost has no memory effect. Therefore, users do not need special methods and equipment in the activation process of new lithium batteries. Not only in theory, but in my own practice, the "natural activation" of the standard method of charging from the beginning is the best.

For the "activation" of lithium-ion batteries, many say: charging time must be more than 12 hours, if you do this three times, in order to activate the battery. This "the first three time charge to charge more than 12 hours", apparently from nickel battery, such as nickel cadmium and nickel metal hydride) continue down. So that, the outset misinformation, so to speak. Lithium-ion and nickel batteries charging and discharging characteristics have very big difference, and can be very clear tell you, I have looked at all serious formal technical data will emphasize overcharge and over discharge of lithium batteries, especially liquid lithium ion battery caused great damage. And charging in accordance with the best charging standard time and standard methods, especially don't charging for more than 12 hours long.

Lithium batteries or chargers automatically stop charging when the battery is full, and there is no so-called "trickling" of nickel chargers that lasts more than 10 hours. That is, if your lithium battery is fully charged, it will also be white on the charger. And none of us can guarantee that the characteristics of the battery charge-discharge protection circuit will never change and the quality is foolproof, so your battery will be in danger of wandering around for a long time. This is another reason why we oppose long charging.

In addition to some machine, charging after more than a certain amount of time, if you don't go to remove the charger, the system does not stop charging, will also begin to discharge - charging cycles. Maybe this vendor has its purpose, but obviously is unfavorable for the life of the battery. At the same time, the charging takes a long time long, often need to be done in the night, and to power grid in China, many places are relatively high voltage in the night, and volatile. Have already said, in front of the lithium battery is very delicate, it is better than nickel electric resistance to fluctuation in charging and discharging ability worse, so it brings the risk of additional.

Another aspect that cannot be ignored is that lithium battery is also not suitable for over discharge, over discharge of lithium battery is also very adverse. This leads to the following question.

2, when in normal use should start charging

Because the number of charge and discharge is limited, so should be lithium battery electric light recharging as much as possible. But I find a lithium ion battery charge and discharge cycle experiment table, the cycle life of the data are listed as follows:

Cycle lifetime (10% DOD) : > 1000 times

Cycle lifetime (100% DOD) : > 200 times

DOD stands for discharge depth. As can be seen from the table, charging times are related to discharge depth, and the cycle life of 10%DOD is much longer than that of 100%DOD. , of course, if the conversion to the actual charge relative to the total capacity: * 1000 * 200 = 200 = 100100%, 10% of the latter to fully charge and discharge is still relatively good, but in front of the net friend of the idea to do some correction: under normal circumstances, you should have a reservation, according to the principle of battery remaining power run out to refill charging, but if your batteries in your expected to 2 days can't insist on the whole during the day, it should start charging in a timely manner. Of course, if you are willing to carry the charger to the office then never matter.

And you need to charge for the upcoming is expected to lead to the communication of the most important events in the busy, even when there are a lot more than battery, so you can just charge in advance, because you didn't really lose "1" time charge cycle life, namely "0. X", and often the x will be small.

The principle of battery remaining power run out to refill is not want you to extremes. Just as popular as long charging is the saying that "try to use up all the battery power of the machine, and it is best to use automatic shutdown". This is actually done on nickel batteries to avoid memory effects, but unfortunately it's also used on lithium batteries today. Once someone because machines low battery warning, without a charge to continue using has been used examples of automatic shutdown. The results in this case the machine in the later charging and boot no reaction, had to send to the maintenance of the service. This is because the battery voltage is too low, caused by the excessive discharge that do not have normal charging and boot conditions.

3, the correct way to charge a lithium battery

In conclusion, the most important hint for charging and discharging problems of lithium battery in use is as follows:

1, according to the standard time and procedure charging, even so will three times before;

2, when the machine power is too low when prompted, try to start charging in a timely manner;

3, the activation of the lithium battery does not need special method, the machine in normal use lithium battery activation naturally. If you are determined to use of "three times before 12 hours long charging activation" approach, in fact there will be no effect.

Therefore, any pursuit of 12-hour super-long charging and automatic shut-down of lithium batteries is wrong. If you have done something wrong before, please correct it before it is too late.

4, Pay attention to fire prevention when using lithium batteries

There are a lot of people probably began to be familiar with lithium batteries from mobile phones. In fact, it has used in many household appliances. There is little doubt that lithium battery efficiency, light weight etc. Advantage is making its application quickly. But, do you know that careless use of it can also make you "fire"?

Lithium battery has a light weight, high efficiency, the advantages of resistance to low temperature 40 ℃ (-), 0.3 mm thick, the size of a stamp lithium battery can used more than 5 years in a row, has been phased out in recent years now with alkaline manganese batteries and batteries, widely used in many high-end home appliances and mobile phones.

Lithium battery is different from the current manganese battery and alkaline dry battery zinc chloride and potassium hydroxide water soluble electrolyte, it USES organic solvent. Lithium battery positive electrode uses manganese dioxide, lead fluoride, sulfur chloride and other materials. The lithium metal foil used in the negative electrode is compared with the zinc chloride used in the negative electrode of the general battery, which has a strong tendency of ionization and a large voltage difference between the positive and negative electrodes, thus improving the working efficiency of the lithium battery.

However, lithium battery in the use of the process often causes heat, burning phenomenon, the light affects the use of the host, serious will burn down the host cause a fire. It has been reported in recent years, a number of household fires caused by the burning of lithium batteries have occurred in Japan.

So why do lithium batteries get hot and burn? The original lithium battery in many materials and water contact can cause violent chemical reactions and release a lot of heat resulting in heat, combustion phenomenon. Lithium manganese dioxide battery anode, with only a small drop of water can be heat up. After contact with water, sulfite chloride in lithium battery generates hydrochloric acid and sulfur dioxide and releases heat energy at the same time. Several factors make lithium battery become the "fire" in life. Therefore, people in the use of lithium batteries must pay attention to waterproof and moisture-proof. After all kinds of main engines are out of service, the lithium battery should be removed and placed in dry and low temperature for proper storage to prevent and avoid improper use of lithium battery causing family fire accidents.

The page contains the contents of the machine translation.