The power bank is not enough.
In the early and middle stages of charging, mx is high-current charging, requiring the power supply to provide 1.2a current.
If the current doesn't reach it, lower it.
However, your charging bank can not provide such a large current, but if you want to achieve such a high current, it will exceed the maximum power of your charging bank, and the charging bank is protected! The current just goes on and off.
It is also possible that at high currents, the line voltage drop is too large, causing the mx to detect the charging voltage below the acceptable minimum value, and the mx automatically displays the charger disconnected.
1, the power of the charging treasure is small, can not provide the current required for mobile phone charging.
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2. The charging bank fails.
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3. Poor connector contact.
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4. The charging cable is damaged.