Mobile phone battery charging

As for the "activation" of lithium batteries, many people say that the charging time must exceed 12 hours, and the battery should be fully charged and discharged for three times repeatedly to activate the battery. The statement that "the first three times of charging should be more than 12 hours" is for rechargeable batteries in the 1990s. At that time, nickel-cadmium batteries have memory effect and need to be fully charged to ensure battery capacity. The lithium-ion battery used on the mobile phone has no memory effect. It can be fully charged in 2-3 hours, which is enough. If the first three times of charging and discharging of a new battery can reach 12 hours or more, it will cause great damage to the battery, and may cause the battery to swell or even burn. Fortunately, both the mobile phone and the charger have protection circuits. When the battery is charged to 100%, it will automatically power off, and it will not continue to charge when plugged into the charger. However, it is better to unplug the charger at this time to prevent the battery from overcharging in case of problems in the charger protection circuit, which will cause serious damage to the battery material and affect the capacity and life of the battery. [1] Generally, the charging method described in the mobile phone manual is the standard charging method suitable for the mobile phone.