However, why are some products written on the manual, it is recommended that the user use the first three times, to fully charge and discharge the mobile phone? Is this not activated? In fact, the fact is that after the battery is shipped, then sold, and then in the hands of the user, it will go through a period of time, a month or a few months, so that the electrode material of the battery will be "passivated" and the capacity is low. At normal values, the usage time is also shortened. However, the lithium battery is easy to activate, as long as the battery is activated after 3 to 5 normal charge and discharge cycles, and the normal capacity is restored. Due to the characteristics of the lithium battery itself, it is determined that it has almost no memory effect. Therefore, the user's new lithium battery does not require special methods and equipment during the activation process.