Why do lithium batteries have 4.2 volts and 3.2 volts

- Oct 28, 2019-

The rated voltage of a lithium-ion battery is 3.7V, but it is not always able to maintain 3.7V during use. In the case of full charge, the maximum can reach 4.2V, but once discharged, the voltage will drop quickly. Lithium-ion batteries can sustain discharge at 3.8~3.6V for a long time, and then there will be a voltage drop. Excessive discharge will affect the life of the lithium-ion battery, so the discharge should be stopped after the voltage is lower than 3.2V, and charged in time.