When using lithium battery, it should be noted that the battery will enter the sleep state after being placed for a period of time. At this time, the capacity is lower than the normal value, and the service time will also be shortened. However, lithium battery is easy to activate. After 3-5 normal charging and discharging cycles, it can activate the battery and restore its normal capacity. Due to the characteristics of lithium battery itself, it has almost no memory effect. Therefore, the new lithium battery in the user's mobile phone does not require special methods and devices during the activation process. Not only in theory, but also in my own practice, it is the best to use the standard method of charging from the beginning, which is a "natural activation" method. As for the "activation" of lithium batteries, many people have said that the charging time must exceed 12 hours, and it must be repeated three times to activate the batteries. The statement that "the first three charges will take more than 12 hours" is obviously a continuation of the statement from nickel batteries (such as nickel cadmium and nickel hydrogen). So this statement can be said to be misinformation at the beginning. The charging and discharging characteristics of lithium batteries and nickel batteries are very different, and we can tell you very clearly that all the serious formal technical data I have reviewed emphasize that overcharge and overdischarge will cause great harm to lithium batteries, especially liquid lithium ion batteries. Therefore, it is better to charge according to the standard time and method, especially not to charge for more than 12 hours. Generally, the charging method described in the mobile phone manual is the standard charging method suitable for the mobile phone.

In addition, the mobile phone or charger with lithium battery will automatically stop charging after the battery is fully charged. There is no so-called "trickle" charging of nickel charger that lasts for more than 10 hours. That is to say, if your lithium battery is fully charged, it will also be charged in vain when it is placed on the charger. And none of us can guarantee that the characteristics of the battery charging and discharging protection circuit will never change and the quality will be foolproof, so your battery will be at the edge of danger for a long time. This is another reason why we oppose long charging. In addition, for some mobile phones, if the charger is not removed after charging for a certain time, the system will not only not stop charging, but also start the discharge charging cycle. Perhaps the manufacturer of this practice has its own purpose, but it is obviously detrimental to the life of the battery and mobile phone/charger. At the same time, long charging takes a long time, often at night. In the case of China's power grid, the voltage at night in many places is relatively high and fluctuates greatly. As has been said before, lithium batteries are very delicate. They are much less resistant to fluctuations in charge and discharge than nickel batteries, which brings additional risks. In addition, another aspect that cannot be ignored is that lithium batteries are also not suitable for overdischarge, which is also very unfavorable to lithium batteries. This leads to the following questions.