1. Record the charging time of the mobile phone through actual recording. According to the experience of use, if you start charging when the power is 0~10%, after half an hour or so, the phone power can be basically restored to about 60%, and the device can be basically judged to be fast charged.
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2. The DC input voltage of the charging interface is 5V±5%, and the maximum absorbed current is 1800mA. As long as the output of the adapter breaks through this condition, it is fast charging.
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Third, download a charging detection software, you can see the device's charging temperature, voltage and whether there is a fast charge.