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Battery legend you don't know

Time:2019/6/27 14:45:06
Recharge the battery three times before charging for more than 12 hours, can not pick up the phone when charging, lithium battery is the most suitable for automatic shutdown ... and so on the "legend" of the battery abound. In fact, these statements are often wrong and unreasonable. Portable devices were originally designed to facilitate our lives, but the battery life problem has made us have to take care of it carefully - is this necessary?

One of the legends: the first three charges take more than 12 hours

The merchant who sells the goods claims to "activate" the lithium battery to reach the maximum power. This statement is not completely wrong, but the problem is that this activation process was completed as early as the production process of the lithium battery, but the lithium battery may be used for a period of time after it leaves the factory. There may be a slight drop in capacity. Once normal use begins, as long as the lithium battery reaches its maximum charge after several charge and discharge cycles, there is absolutely no need to "activate" it.

Conclusion: There is no need to charge for so long, no matter how long it takes, whether it is full or not.

Legend 2: The longer the charging time, the more full the charge

Some people leave the lithium battery that has been shown green light on the charger, saying that the longer it is charged, the more full it will be. Some people also took the battery when they saw the green light, saying that charging the battery for a long time would burn the battery. Both of these arguments have some truth.

The charging speed of a lithium battery is determined by the remaining power, which means that the fuller the battery, the slower the charging speed. If a lithium battery is already full, it will have reached more than 95% of its power. Even if it continues to charge for more than a dozen hours, it will only increase the power by a few percent. It makes no sense.

Moreover, the current control part of some inferior chargers is of relatively poor quality. When the battery is basically full, it is still charged with a large current, which is likely to cause the battery to be damaged. This is not the case for equipment with guaranteed quality.

Conclusion: If it is a miscellaneous card, it is still full of insurance. It does not matter if the quality of the brand-name products is guaranteed.

Legend 3: It is best to remove the battery when the notebook is in fixed use.

Some people think that if you use a laptop with a battery plug, the battery will be charged and discharged for a long time, and the life will be shortened quickly. In fact, the laptop's battery will not work when plugged in, and it will stop when it is full. A simple test can explain the problem: the laptop battery is removed when the power is plugged in, and then the laptop does not appear to be powered off or restarted, indicating that the laptop is not charged first. Released.

But mobile phones are often different. If you remove the battery while plugging in the power, most mobile phones will be powered off, and similar devices like PDAs are the same.

Conclusion: The laptop will not extend the life of the battery, and the phone will be charged when the phone is charged. The charging speed is slower and has no effect on the life.

Legend 4: Lithium battery is the most cost-effective to use automatic shutdown

This statement probably comes from the concept of “maximum charge and discharge times” for lithium batteries. Many lithium batteries have a "chargeable discharge 500 times" or similar nominal. The consciousness of this indicator is that when the lithium battery has been charged and discharged 500 times, the actual capacity should be more than 60% of the nominal capacity - - Since it can only be charged and discharged 500 times, is it not the most cost-effective to use it every time?

The question is how to charge and discharge only once? It does not mean plugging in the charger and then unplugging it, but rather how much electricity is actually charged. Each charge is 10% and repeated 10 times, and once the battery is fully charged, it counts as one charge and discharge cycle, and has nothing to do with whether it is full or not. It is only necessary to use the battery to charge, it will only increase the chance of losing the chain at a critical moment. And from the perspective of lithium battery life, shallow charging is more reasonable.

Conclusion: Lithium batteries are charged and discharged at will, so don't care.
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