Zte C78 User Manual page 29

1. Pull the rubber USB cover out of the USB port and move it out of the way.
2. Insert the charger's USB adapter into the USB port. Ensure that the adapter is
inserted with the correct orientation. Do not force the connector into the USB port.
Note: Make sure you plug the AC charger into a standard AC outlet box when you
begin charging the battery.
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C78 User Manual