Zte Concord II User Manual page 18

1. Connect the adapter to the charging jack. Ensure that the
adapter is inserted with the correct orientation. Do not force
the connector into the charging jack.
2. Connect the charger to a standard AC wall outlet. If the phone
is on, you'll see a charging icon, such as
on the status bar.
3. Disconnect the charger when the battery is fully charged.
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