● Opinion 1: The new battery you just bought will have some residual electricity. Use up the residual power in the battery until it is turned off, and then charge it with an external power supply. The charging time must exceed 12 hour, and it must be repeated three times to activate the battery.
Viewpoint 2: It is not necessary to charge the battery for 10 hour to activate the battery activity, but it can be activated according to the normal charging and discharging method.
● Survey results: After investigation, the author found that 18 was the second opinion among 24 university notebook users, and this charging method did not cause any harm to the future battery use. Of course, we must rule out natural destructive factors. So is the author himself. When the new battery is used normally, it takes two and a half hours at most. At present, two years later, the battery is still very good, and it can still last for more than two hours. So I'm satisfied?
● Suggested method: The author agrees with the second view. According to the available information, the activation of the battery should be completed in the factory. The notebook battery comes with a little power when it leaves the factory to avoid damage caused by natural wear. The activation of the battery should be carried out without a protection circuit, but the lithium battery circuit itself has a protection circuit. The purpose of this circuit is to avoid overcharge and discharge of the battery. Generally, after the battery is fully charged, the charging indicator light goes out and the battery can't be charged, so what's the use of plugging the power plug into the battery? It can be seen from the condition of the battery whether it is fully charged. In addition, I will teach you a simple method to judge whether the battery is charged. When the battery is charged, it will generate heat. When the battery is fully charged for one hour (the power plug has not been unplugged), try the battery again to see if it is still hot. The result must be cold, because the battery is not in a state of charge and discharge, and of course it does not heat up. Notebook manufacturers will recommend charging the new battery for more than 10 hour when leaving the factory. Perhaps this sentence made some users have the first wrong view. The author's point of view is that notebook manufacturers simply let some new users charge for ten hours, considering that they can't fully master the charging skills when using new batteries, which should be an expedient measure for businesses.
Debate 2: Do you unplug the battery when the external power supply is connected?
● Viewpoint 1: When using an external power supply, take out the battery.
● Viewpoint 2: You don't need to remove the battery when using an external power supply.
● Survey results: Most students remove the battery when using the external power supply, and only a few students put the battery on it when using the external power supply. The brands used by these students are all internationally famous brands.
● Suggested method: In fact, whether the battery is removed or not, the contradiction mainly focuses on whether the battery is charged when the external power supply is used. You know, the charge and discharge times of the battery are directly related to the service life. The charge and discharge times of lithium batteries are generally fixed, with only 400-600 times of charging and only 800 times of specially improved products. Every charge of the battery is a step towards retirement. The first view is nothing more than fear that when the power supply is used, the battery will be charged on it, which will not only increase the number of charging times, but also cause overcharge. The second view is that a fully charged battery is placed on a computer and will not be recharged when using an external power supply. In fact, both of these views have their correct side, but they also have their wrong side. Because this is just a personal opinion, not very comprehensive. After the author's investigation, many notebook manufacturers now consider the fragility of batteries and add battery protection technology to their products, so different brands of notebook batteries have different charging protection technologies, like some big manufacturers, such as IBM, Hewlett-Packard, Toshiba, Compaq and so on. Among them, IBM is the most considerate. IBM's notebook computer can detect the battery discharge, and ThinkPad notebook will automatically charge only when the battery charge is lower than 95%. This can protect the battery well, and now many other manufacturers have followed suit. So you don't need to unplug the battery like this when you use it, because it will only be charged when the power is lower than 95%. Even so, if you use the computer for a long time, it is better to remove the battery, because the heat generated by the long-term operation of the notebook will cause certain damage to the battery. Other "small brands" of notebook batteries do not enjoy this treatment, because their batteries have no protection technology. Like a brand of notebook computer used by the author, if a fully charged battery is put on it, it must be charged first when using an external power supply, because the battery will be damaged when stored, and it is impossible to reach 100%. As long as it is not 100%, it must be charged when the power supply is connected. Every time an external power supply is connected, it is equivalent to charging the battery once, although it is only charged for a short time. Therefore, I suggest you check the notebook manual and choose whether to remove the battery when using the external power supply according to the situation of your machine.
Third, debate three: how to charge correctly?
● Viewpoint 1: The battery should be completely used up every time, so that the laptop will automatically turn off and charge, and it should be fully charged every time.
● Viewpoint 2: Don't pay attention to the battery when using it. Charge it if you want.
● Survey results: Most students said that there is no need to use automatic shutdown to recharge like the first view, and unlike the second view, recharging is very casual. Usually the computer prompts you to charge the battery. Of course, the prompt time can be set by yourself, and the default is 3%.
● Suggested method: The method suggested by the author is the same as that of most students. In fact, whether the notebook uses lithium batteries or nickel-hydrogen batteries, these batteries have memory effect. Obviously, Ni-MH battery has memory effect, but lithium battery also has memory effect, but the memory effect is smaller than Ni-MH. The statement that lithium batteries have no memory effect is just that businesses irresponsibly exaggerate advertising behavior, which is completely misleading. So since the battery has a memory effect, you should pay attention to it when charging, and try to use it up before recharging, but you don't have to deliberately say that you must use the computer to automatically turn it off. Although there is no harm in using it (because the notebook battery has charge and discharge protection, the automatic shutdown of ordinary notebook can not meet the standard of battery discharge protection), but do you feel tired? In fact, charging below 3% is very good, and the memory effect will definitely be there. Compared with natural loss, it should be nothing. As for the second point of view, I totally disagree. As I said just now, notebook batteries, whether nickel-hydrogen or lithium-ion, have memory effect. If this method is followed, the battery life will be greatly shortened.