The article "On the charging time of mobile phone batteries" has already talked about this problem. For the nickel-based batteries with constant current charging, it can be said that, while for lithium-ion batteries, this is not completely correct.

　　For the charging of lithium ion batteries, within a certain current range (1.5c~0.5c), increasing the constant current value of the constant current and constant voltage charging method does not shorten the time to fully charge the lithium ion battery.

　　Is the output current of the direct charging standard equal to the charging current?

　　This is to discuss the charging method of the mobile phone. For the charging management in the mobile phone, set the output of the same direct charge (actually called the power adapter), such as: 5.3v600maa. The charging management is a switch mode (high-frequency pulse width adjustment). pwm method), in this charging method, the mobile phone does not fully utilize the output capacity of direct charging. The direct charging works in the constant voltage section and outputs 5.3v. At this time, the real charging current is adjusted by the charging management of the mobile phone, and it must be less than 600ma , Generally between 300~400ma. At this time, the output current of the direct charge that everyone sees is not the charging current of the mobile phone. For example, many of Motorola's direct charge output is 5.0v1a, and the real battery charging only uses 500ma. , Because the battery capacity of the mobile phone is only 580mah.

　　At this time, the output current of the direct charging is not equal to the actual charging current.