Spell more to buy more charging head can not charge the charging bank is poor contact. If the USB interface can not be charged on the appliance, you can unplug the battery first, and then put it on the universal charger, and try it on the appliance to see if it can be charged, if it can be charged, it may be the problem of the USB contact port of the device.
If the battery has a problem, and the universal charger can not be charged, then it proves that the battery of your device has a problem, at this time, you can go to replace the battery, or the battery pack in the electric blanket for a while, and then take out the charge to see if there is an effect
Probably because the power bank is in charge protection state. When the mobile power supply is overcharged or the charging voltage is too high, the mobile power supply will enter the charging protection state, which is not charged at this time, and the mobile power supply can be plugged into the USB output of the computer for 2 hours to charge the charging protection state
It is possible that the charging bank is broken, either the usb data cable is broken, or the charging head is broken. Replace and try.