15w charging treasure can not be charged 40w mobile phones, because most of the 40 watt mobile phones do not support 15 watts of fast charging, 40 watts of mobile phones only have to support the charging speed of 40 watts of power and the most basic 10 watts of charging power, 15 watts of charging treasure to 40 watts of mobile phones, at most can only run with 10 watts of power, but can not run with 15 watts of power.
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