It can be simply explained that there are two cells and one cell inside a battery.
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The single cell is limited to the current battery in the charging can withstand the voltage and current is not high enough, if you want to achieve more than 60W high power fast charge must use the \"high voltage, high current\" way to improve the charging power, but this heating situation will be more serious. And the single-cell scheme due to the use of large current scheme, in order to ensure safety, generally can not maintain the peak charging power for a long time, it seems to appear that the peak of 100W, but actually can not maintain the peak power for a long time.
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The principle of double cell design is very simple, the ordinary single-cell battery can withstand the voltage and current when charging is not high enough, so the manufacturer simply gives the mobile phone with two cells, divides the mobile phone battery in two, and uses two charge pumps to charge the mobile phone stream respectively, achieving double the charging speed. For example, the 65W super flash charge of OPPO Reno6 Pro uses a series dual-cell low-voltage direct charge scheme