3.7V is the nominal voltage of the industry, that is, the average value platform of battery discharge. 4.2V refers to the battery voltage when fully charged. The voltage when it cannot support the current work demand) is 3.2V, which is a lithium battery with relatively ordinary performance.

Lithium battery cells starting from 4.35V are high-voltage lithium batteries, and their material ratio will be different from those of 4.2V, and the energy density will be higher. That is to say, under the same volume, lithium batteries have larger capacity and electronic The battery life of the device is also longer.

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