Misunderstandings about charging new mobile phones

Many friends think that the first three times a new mobile phone is just bought, it needs to be charged for more than 12 hours, so as to ensure the longest battery life. In fact, this concept is outdated. The so-called charging for 12 hours to activate the battery is for Ni-MH batteries, and most of the current smart phones on the market use lithium batteries. Lithium batteries don't need to be activated, and they don't use memory functions, so they can be charged and used at any time. They are not as particular as Ni-MH batteries.

If you want your smartphone to maintain the battery life it can achieve, you may wish to follow the following methods to charge:

1. The new mobile phone can be used for the first three times to the low battery alarm. Use the original direct charge to fully charge the mobile phone while it is turned on, and then charge it for 1 hour. This is recommended considering the error of the charging control, and it is not necessary to charge to 12 hour.

2. Many people like to charge their mobile phone before going to bed. In fact, this will cause the mobile phone to charge too long, which will cause some damage to the mobile phone battery. In addition, in many areas, the night voltage is relatively high and fluctuates greatly, which has no positive effect on the maintenance of battery life.

3. At present, the general smart phones on the market can be charged, used and stopped at any time. Don't wait for the phone to automatically shut down after a completely dead battery before recharging, as this will cause great damage to the battery. After the battery is fully charged, it can continue to charge for 15-30 minutes, which is useless.

In fact, the current smart phones use lithium batteries, which are not as fragile as everyone thinks. When the phone battery is fully charged, it will automatically cut off the charging power to avoid overloading and overcharging, so there is no need to worry about damage to the phone’s battery. There is no need to get up in the middle of the night to unplug the power supply, users can have a good night's sleep at ease!

Of course, it should be noted that the mobile phone charger used must be a regular charger, preferably an original charger. Some counterfeit or mismatched chargers should not be used to charge the phone at night to prevent poor quality of the charger, which may cause the charger to burn and damage the phone.

Lu Jianguo, director of the comprehensive inspection department of the National Household Appliance Quality Supervision and Inspection Center of the China Household Electrical Appliances Research Institute, told the "Life Times" reporter that different battery products require different methods to charge and must be used according to the product instructions. Early nickel-cadmium batteries and nickel-hydrogen batteries required similar "activation." These batteries will produce a "memory effect". Charging in an incompletely discharged state can easily cause the battery to be overcharged. After a long time, users will feel that the battery will run out quickly. However, most of the batteries used in mobile phones and laptops are lithium-ion batteries. Its initialization process has been completed at the time of manufacture, so it does not need to be activated when it starts to use.

Generally, the life of a lithium-ion battery can reach hundreds of charge-discharge cycles. The charge-discharge cycle here refers to the process of using up the power and then recharging it, rather than plugging in the charger and unplugging it once. Lithium batteries have no memory effect and can be charged at any time. In order to reduce the number of recharges, deliberately using up the battery before fully recharging it will not extend the battery life, but will have a negative impact on the battery life. In addition, if the mobile phone uses automatic shutdown, the internal voltage of the lithium battery will be too low due to excessive discharge, and it may not be able to turn on and charge. Therefore, the charging of lithium batteries pays attention to "eat less and more meals", and frequent shallow charge and discharge are more helpful to extend its life.

Lithium batteries generally have a safety protection circuit and a variety of safety devices to ensure that the circuit of the battery is automatically cut off in the event of excessive charging and discharging and short-circuit; too high internal pressure of the battery will trigger the decompression of the exhaust device; too high battery temperature will trigger heat Melt protection device to stop the electrochemical reaction of the battery. Therefore, unless there is a quality problem, the battery will not explode after being plugged in for a long time. However, if the battery is not unplugged after being fully charged, the battery will remain fully charged. Although it will not explode, it will speed up the loss of battery capacity.

In addition, there are rumors that answering the phone while charging can cause an explosion. Lu Jianguo said that this argument is untenable. If there is such a danger, the product will set a procedure for not connecting to the phone when charging. However, from a health point of view, the wire will limit the user's range of activities, and making calls while charging may cause the user to stay in one place for a long time and cause excessive muscle tension. Therefore, it is best to unplug the power before talking. When charging, do not cover anything on the battery and do not put it on the bed to avoid fire.

It depends on what battery you have. Just like there are many lithium batteries now

First of all, repeated charging will not damage the battery. Repeated charging and discharging will basically not damage the battery. Because lithium is relatively active and has no memory effect, batteries made of lithium can be charged and discharged repeatedly. The thinking of most of us (more than 90%) still remains in the shadow of the popular nickel-hydrogen battery a few years ago, because the nickel element itself is not active and the element has a memory effect on electrons, that is: remembering the depth of the last charge and discharge ! Therefore, if the battery is not used up or charged for a long time (fully stimulates the nickel element-because it is not active), the best charging effect cannot be achieved, so the general charging time is one night or more than a few hours!

But now it has changed comrades. We are now using lithium, which cannot exist independently in nature, but can only exist in compounds. You can refer to the periodic table. The half-life of lithium is very short and there is no memory effect, so lithium batteries are in use It is not possible to charge and discharge for a long time during the process, because long-term charging will cause the elements that are themselves very active to move violently under the state of electron saturation, and at the same time, there will be explosions, that is: the charging time is best to be 2- 4 hours, preferably not more than 4 hours (the element is more active, the charging is activated quickly, and the charging time is shortened accordingly. Even the first charge is only 2 to 4 hours, because lithium is no longer needed. Activated, charging for a long time will affect the activity of the lithium element in the charging and discharging process), by the way, the charging process of the lithium battery, we will find that it is full in 1 and a half hours or 2 hours during the charging process. It’s fine to charge for another half an hour at the same time, because the charging is completed by the voltage charge first, and then the electronic charge is completed, which takes about half an hour! When using electricity, it is also best not to completely use up and recharge, because when it is used up, the compound required for the reverse reaction of the lithium element is insufficient and cannot be fully charged, resulting in a decrease in battery capacity!

and so,

1. Charging time 2-4 hours (not too long, a long time will seriously affect battery life and danger)

2. The first time charging can not be long, just the same as usual (don't enter the misunderstanding of Ni-MH battery)

3. It is not possible to completely use the photoelectric (completely used up, which will have a serious impact on the battery life). A lithium battery can be deeply discharged only a few times.

4. During use, if you see that there is almost no electricity, you can charge it when you feel it is not enough. It is best to be fully charged. It does not matter if you are dissatisfied!

5. Recharge as you use it, recharge as you go! This is the slogan of the inventor of the lithium battery. If charging is so troublesome as the nickel-hydrogen battery, who would have invented a lithium battery that is much less stable than the nickel-hydrogen battery! Isn't it the convenience of lithium batteries?