Does the polymer lithium battery need to be charged for 12 hours?

First, don't overcharge. (How long does it take?)

Lithium batteries have been activated at the factory, so now some businesses still have outdated "activation", it is very harmful. In fact, when the battery is fully charged, the overcharge protection circuit will be activated, the charging power will be cut off, the battery will start to discharge, and after a period of time, it will start to charge again, so that it will be alternately charged and replaced. This way back and forth charging will actually shorten the battery charging cycle (later). Generally, lithium battery will be basically full in 2-3 hours, and after 90%, it will basically be a slow charging process. It will be enough to charge up to 1-2 hours. That is to charge 4-5 hours, not more than 6 hours.

The so-called new battery head is 3 hours in a row for 12 hours. It is already the old common sense of the nickel-hydrogen battery era. It is not impossible to charge it. You have no problem with charging. Lithium batteries have protection circuits, and the battery will not be broken. However, after the protection circuit works, the battery will enter a “put-charge-discharge” cycle, which is invisible to use the originally unnecessary charging cycle, which is reduced in disguise the service life. It is not excluded that some poor quality lithium batteries will have problems after a long period of time.

Second, don't let go. (When should the battery be charged?)

Many people always think that there is an upper limit on the number of times that lithium battery is charged (in fact, it is not the number of times of powering, but the cycle of power--this later), so every time you use the battery as much as possible, it is not enough to turn off the power automatically. Not to charge, this is actually not good. It is easy to cause excessive discharge. Over-discharge has a direct impact on the life of the battery. It may be 1-2 times that a complete discharge will cause the battery to be scrapped. Therefore, the battery can be charged at 10%, and the minimum is not less than 3%.

The most likely over-discharge is when the mobile phone is used outside, the handle is used for automatic shutdown, and even the boot cannot be turned on, but there is no charger so that it cannot be charged for a certain period of time, the result is that the battery is formed by self-discharge. Over-discharge, this is the most likely scenario. In another case, the battery is left unused for a long time, but there is not much power before storage, causing the battery to "chronic suicide."

At present, some equipment will remind you when the battery is still 5-10%, and then automatically shut down when the second reminder. It is estimated that the second time is also 2-3%, and the remaining power is very small. Therefore, it is strongly recommended that after the equipment is automatically shut down, you must not try to turn it on again. Charging as soon as possible is the most important thing. It is best to charge the battery before the first reminder.

From the characteristics of lithium batteries, I personally feel that it is not necessary to charge for the first time charging. Lithium batteries have no memory effect, and have little effect on capacity and service life. Lithium batteries are mainly charge cut-off voltage, which is fatal to lithium batteries.

Third, what is the charging cycle (or charging and discharging cycle)?

Many people think that the life of lithium battery is the number of times of power-off. In fact, it is wrong. Strictly speaking, it should be called the charging cycle. A complete charging cycle is to charge 100% of the electricity, and then put 100% of the electricity. Lithium battery life is about 300-500 full charge cycles. The correct statement about lithium battery life should be 300-500 full charge and discharge.

In other words, suppose a piece full of 100% battery: 50% used, charged 30%, this is not a complete cycle, a full cycle is charged and put two 100%, which is actually 40% cycle, waiting for you again 60% charged40%, then there is a 90% cycle, and so on.

Lithium battery has no memory effect, so I agree with Apple's claim that the use of lithium battery should be, use some, charge some, not charge for too long, and do not use fine light.

Fourth, the environment used by lithium battery

The use of lithium batteries in too hot or too cold environment has an impact on the life of lithium batteries, so on a hot day, do not put your phone in the car or in the sun; if the outside is less than 20 degrees in winter, Don't take your phone outside (have been exposed for a long time), or put it in a warm pocket, use headphones (do not use a Bluetooth headset, it is also with lithium).

Quote:

Polymer lithium ion battery: the temperature range is 0 to +45 ° C during charging; the temperature range is -20 to +60 ° C during discharge; the long-term storage environment of the battery is: temperature -20 to +35 ° C.

Fifth, what need to do when lithium battery not in use

The self-discharge rate of lithium polymer battery is still a little high, to be on the safe side, if not, it is best to first fill, then plastic bag sealed after storage. 1-2 months to take out and use once, that is, charge and release once, to maintain the activity of lithium ions. The longest should not exceed 3 months, must take out fill put. If not used for a long time, the lithium ion activity will decrease, which has an impact on the battery life.

Sixth, open USB charging or not

Now more and more devices support USB charging, and personally feel that it can be opened, or the above reasons. However, USB charging, I saw a friend posted that because the voltage is not enough, the charge is not full (PDA has not encountered, can be full, do not know why 580 does not work), I also encountered the same situation. From a customary point of view, I still don't want to plug in the USB every time. I have to charge a little for a while, which is mainly a habit, so I turned off the USB charging myself. If it is not powered, it can be turned on again to recharge it, anyway, it is convenient. At the same time, I don't know if charging the mobile phone in the case of non-standard voltage will have an impact on the mobile phone and the battery. If I don't know the truth, the individual tends to turn off the USB charging as much as possible.

Seventh, how to charge better

The last small suggestion, the original lithium battery is best not to use the charger to charge, use equipment + original charger, or to buy the original charger. Because the brand-name charger is often not used for standard voltage and current, it is harmful to the original battery. Especially the old-fashioned charger with discharge function, don't use it, accidentally put it over, the battery is finished.

In addition, some friends later asked about the use of miscellaneous lithium batteries, here also by the way to mention personal views - imitation of the original electricity (in fact, is the fake original electricity), and the real brand of electricity, the use of lithium-ion batteries (because the cost is relatively Low, the production cost of lithium polymer batteries is relatively high), on the one hand, there is certainly no lithium polymer battery (the density of lithium polymer batteries is greater). Moreover, the safety of lithium-ion batteries is not as good as that of lithium-polymer batteries. There are many explosion-prone spontaneous combustion events in notebooks (not many on mobile phones, but there are also), which is the instability after the lithium-ion battery has been used for a long time.

Therefore, off-brand batteries cannot be overcharged, do not expect to charge a longer time to improve because of the short time, it is impossible. And off-brand battery use for a long time, it should be changed as soon as possible, don't be reluctant, safety first. As to charge when, with what go all right, with random brand charger, mobile phone charging is also OK, there should be no impact on the phone (guess, did not study).

The page contains the contents of the machine translation.