1, Mi 8 supports fast charging, according to the parameters of the Xiaomi official website show that Mi 8 supports the QC4.0 fast charging protocol, and the packaging standard is 18W QC3.0 fast charging;
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2. When using the QC4.0 charger certified by Qualcomm, the instantaneous charging voltage of the mobile phone is about 6.025V, the current is 2.655A, and the power can reach nearly 16W; Using the original QC3.0 charger, the instantaneous charging concept voltage is about 5.154V, and the charging current is 0.778A. Neither of them can stabilize at 18W for a long time;
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3, in the charging time, the overall time of QC4.0 charger and QC3.0 charger is basically the same, which takes about 1 hour and 56 minutes; When charging with QC4.0 charger, USB PD3.0 voltage will be preferred for charging, rather than QC3.0 mode.