Now the mobile phone uses a lithium-ion battery, so there is no memory effect problem, and there is no need to activate. The first charge does not need to be flushed for more than 12 hours like nickel. It only needs to charge for about 4 hours. The life of the ion battery is only The number of times of charging is related, and the lithium-ion battery can be charged about 1000 times. Standby time is related to usage. However, selling mobile phones said that the previous three charging times should reach 12 hours. what happened?
1. How to charge a 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 sleep state. At this time, the capacity is lower than the normal value, and the use time is also shortened. But the lithium battery is very
Easy to activate, as long as after 3-5 normal charge and discharge cycles, the battery can be activated to restore normal capacity. Due to the characteristics of the lithium battery itself, it is determined that it has almost no memory effect.
Therefore, the new lithium battery in the user's mobile phone does not require special methods and equipment during the activation process. Not only in theory, but from my own practice, I’ve taken it from the very beginning.
It is best to charge this "natural activation" method using standard methods.
For the "activation" problem of lithium batteries, many claims are: charging time must be more than 12 hours, repeated three times in order to activate the battery. This kind of "three charging before charging"
The saying of more than 12 hours is obviously a continuation of nickel batteries (such as nickel cadmium and nickel hydride). So this statement can be said to be misinformation at the beginning. Lithium and nickel batteries
The charge and discharge characteristics are very different, and it is very clear to tell everyone that all the serious formal technical information I have reviewed emphasizes that overcharge and overdischarge will make lithium battery
Pools, especially liquid lithium-ion batteries, cause enormous damage. Therefore, it is best to charge according to standard time and standard methods, especially not to charge for more than 12 hours.
. 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 fully charged, there is no so-called “turbulent†charging that the nickel battery charger has for 10 hours. That is
If your lithium battery is full, it will be white charger on the charger. And none of us can guarantee that the characteristics of the battery's charge and 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 why we oppose long charging.
In addition, on some mobile phones, after charging for more than a certain period of time, if you do not remove the charger, then the system will not stop charging, and will start the discharge-charge cycle. Maybe
Manufacturers of this approach have their own purposes, but are clearly disadvantageous for the life of batteries and mobile phones/chargers. At the same time, long charging takes a long time and often needs to be done at night.
According to the situation of China's power grid, the voltage at night in many places is relatively high, and the fluctuation is large. As mentioned earlier, the lithium battery is very delicate, it is more resistant to charge and discharge than nickel.
The ability to fluctuate is much worse, which in turn brings additional danger.
In addition, another aspect that cannot be ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also disadvantageous for lithium batteries. This leads to the following problem.
2. When should I start charging during normal use?
In our forum, we can often see this statement, because the number of charge and discharge is limited, so the battery of the mobile phone should be recharged as much as possible. But I am looking for
To an experimental table on the charge and discharge cycle of a lithium-ion battery, the data on cycle life are listed below:
Cycle life (10% DOD): >1000 times
Cycle life (100% DOD): >200 times
Among them, DOD is the abbreviation of depth of discharge. As can be seen from the table, the number of chargeables is related to the depth of discharge, and the cycle life at 10% DOD is much longer than that of 100% DOD. of course
If it is converted to the relative total capacity of the actual charge: 10% * 1000 = 100, 100% * 200 = 200, the latter's full charge and discharge is still better, but the former netizen's statement
Make some corrections: Under normal circumstances, you should have the reserve to charge according to the principle that the remaining battery power is used up, but if your battery is not expected to stick to the whole day on the 2nd day.
During the day, you should start charging in time. Of course, if you are willing to carry the charger to the office, it is a different matter.
And you need to charge to cope with the anticipated important events that will cause the communication to be busy, even if the battery still has a lot of power, then you only charge in advance.
Because you didn't really lose "1" charge cycle life, which is "0.x", and often this x will be small.
The principle of recharging the remaining battery power is not to go to extremes. One of the more widely spread sayings like long charging is to "try to run out of battery power.
It is best to use automatic shutdown. This is actually a practice on nickel batteries, the purpose is to avoid memory effects, unfortunately it is also circulating on lithium batteries.
After the warning of the low battery level of the mobile phone, the person still does not charge and continues to use the example that has been used for automatic shutdown. As a result, the phone in this example was later charged and turned on.
No response, have to send customer service overhaul. This is actually caused by the battery being over-discharged and the voltage is too low, so that it does not have normal charging and power-on conditions.
3, the correct practice for lithium battery mobile phones
To sum up, my most important tips on the charging and discharging problems of lithium battery mobile phones in use are:
1. Charge according to standard time and procedures, even if it is the first three times;
2. When there is a low battery power prompt, you should start charging as soon as possible;
3. The activation of the lithium battery does not require a special method. The lithium battery will naturally activate during normal use of the mobile phone. If you insist on using the "three previous 12 hours of long charge activation"
The method does not actually work.
Therefore, all the pursuit of 12 hours of ultra-long charging and the use of lithium battery mobile phones to automatically shut down are wrong. If you used to do it in the wrong way,
Please correct it in time, maybe it is not too late.
Of course, in the case of good quality of the mobile phone and charger protection and control circuit, the protection of the lithium battery is quite guaranteed. So the understanding of the charging rules is the focus, and in some cases it is also possible to make some concessions. For example, if you find that the phone must be charged before you go to sleep at night, you can also start charging before going to bed. The point is that you should know what the right approach is and don't deliberately follow the wrong way.