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In the use of lithium-ion batteries, 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-ion batteries are easy to activate. They can be activated after 35 normal charge-discharge cycles to restore normal capacity. Because of the characteristics of lithium-ion battery itself, it has almost no memory effect. Therefore, the new lithium-ion battery in the user's mobile phone should not be activated by special methods and devices. Not only in theory, but from my own practice, it is the best to use the standard method of charging from the beginning.
As for the activation of lithium-ion batteries, many people say that the charging time must be more than 12 hours and repeated three times to activate the battery. The statement that the first three times of charging need more than 12 hours is obviously a continuation of nickel batteries (such as nickel cadmium and nickel hydrogen). So this statement can be said to be misinterpreted at the beginning. The charge and discharge characteristics of lithium-ion batteries and nickel batteries are very different, and I can tell you very clearly that all the serious official technical data I have reviewed emphasize that overcharge and overcharge will cause great damage to lithium-ion batteries, especially liquid lithium-ion batteries. Therefore, it is better to charge according to the standard time and standard method, especially do not 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 of lithium-ion battery will automatically stop charging after the battery is fully charged, and there is no so-called trickle charge lasting for more than 10 hours. That is to say, if your lithium-ion battery is fully charged, it is also a white charge when placed on the charger. However, none of us can guarantee that the characteristics of the charge and discharge protection circuit of the battery will never change and the quality will be guaranteed, so your battery will be at the edge of danger for a long time. This is another reason why we oppose long-term charging.
In addition, for some mobile phones, if the charger is not removed after charging for a certain time, the system will not only stop charging, but also start the discharge-charge cycle. Maybe the manufacturer of this method has its own purpose, but it is obviously detrimental to the life of battery and mobile phone/charger. At the same time, long-term charging takes a long time, and often takes place at night. According to the situation of China's power grid, the voltage at night in many places is relatively high and fluctuates greatly. As has been said before, lithium-ion batteries are very delicate. They are more resistant to charging and discharging than nickel batteries
The ability to fluctuate is much worse, which brings additional risks.
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