How to charge iPhone for the first time
When you buy a new mobile phone, you always want to protect it, especially Apple. If you want to knowfor the first time How to charge iPhone? We need to first understand what its battery is like. What should be noted when using lithium batteries is that the battery enters a dormant state after being left for a period of time. At this time, the capacity is lower than the normal value and the use time is also shortened. However, lithium batteries are easy to activate. After 3-5 normal charge and discharge cycles, the battery can be activated and restored to 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 equipment during the activation process. Not only is this true in theory, but in practice, the "natural activation" method of charging using standard methods from the beginning is best.
Regarding the "activation" problem of lithium batteries, many opinions are: the charging time must be more than 12 hours, repeated three times, to activate the battery. This statement that "the first three charges require more than 12 hours" is obviously a continuation of nickel batteries (such as nickel cadmium and nickel metal hydride). So this statement can be said to be misinformation from the beginning. There is a very big difference in the charging and discharging characteristics of lithium batteries and nickel batteries, and we can tell you very clearly that all serious official technical information emphasizes that overcharging and over-discharging will cause huge damage to lithium batteries, especially liquid lithium-ion batteries. harm. Therefore, it is best to charge according to standard time and standard methods, especially do not charge for more than 12 hours. Usually, the charging method described in the mobile phone manual is the standard charging method suitable for the mobile phone.
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In addition, lithium battery cell phones or chargers will automatically stop charging after the battery is full. There is no so-called "trickle" charging that lasts for more than 10 hours with nickel battery chargers. In other words, if you After the lithium battery is fully charged, it will be charged in vain when placed on the charger. No one can guarantee that the characteristics of the battery's charge and discharge protection circuit will never change and the quality is foolproof, so your battery will be on the edge of danger for a long time. . This is another reason why people are opposed to long charging.
In addition, for some mobile phones, if you do not remove the charger after charging for more than a certain period of time, the system will not stop charging. It will also start a discharge-charge cycle. Maybe the manufacturer has its own purpose for this, but it is obviously detrimental to the life of the battery and the phone/charger. At the same time, long charging takes a long time, often at night. However, judging from the situation of my country's power grid, the voltage in many places is relatively high at night and fluctuates greatly. As mentioned before, lithium batteries are very delicate and are less resistant to fluctuations in charge and discharge than nickel batteries. More, so this brings additional dangers
In addition , another aspect that cannot be ignored is that lithium batteries are not suitable for over-discharge, and over-discharge is also very detrimental to lithium batteries.
