The answer is that the battery needs to be activated, but this is not what the user has to do. I have visited the lithium-ion battery production plant, and the lithium-ion battery has to go through the following process before leaving the factory: the lithium-ion battery shell is filled with electrolyte---seal-- --Formation is constant voltage charging and then discharging. Several cycles are carried out so that the electrode is fully infiltrated in the electrolyte and fully activated until the capacity reaches the requirement. This is the activation process ---Volume dividing, which is the capacity selection of the test battery Batteries with different performance (capacity) are classified, the grade of the battery is divided, and the capacity is matched. The lithium-ion battery that comes out in this way has already been activated by the user. The nickel-cadmium batteries and nickel-hydrogen batteries commonly used by all of us are also In this way, the battery is activated after it is activated. The activation process of some of the batteries requires the battery to be in an open state, and the battery is sealed after activation. This process can only be completed by the battery cell manufacturer. There is a problem here, that is, the battery produced by the battery factory In the hands of the user, this time can sometimes be very long, as short as 1 month, and as long as half a year. At this time, because the battery electrode material will be passivated, the manufacturer recommends that the battery used for the first time be fully charged and discharged for 3 to 5 times. In order to eliminate the passivation of the electrode material and reach the maximum capacity. In the three national standards for nickel-metal hydride, nickel-cadmium and lithium-ion batteries promulgated in 2001, the initial capacity detection is clearly stipulated, and the battery can be 5 Sub-deep charge and deep discharge, when one meets the regulations, the test can be stopped. This explains the phenomenon I said very well.

　　Then it is also possible to call it "second activation". The "new" battery used by the user for the first time should be charged and discharged as many times as possible.

　　However, according to my test (for lithium-ion batteries), a lithium-ion battery with a storage period of 1 to 3 months is subjected to a deep charge and deep discharge cycle treatment, and its capacity increase is almost non-existent. (I am on the topic There is a test report on battery activation in the discussion area).