Zte Z837VL User Manual page 18

unapproved accessories could damage your phone or cause the
battery to explode.
1. Connect the adapter to the charging/micro-USB jack. Ensure
that the adapter is inserted with the correct orientation. Do not
use force.
2. Connect the charger to a standard AC power outlet. If the
phone is on, you'll see a charging icon, such as
appear on the status bar.
3. Disconnect the charger when the battery is fully charged.
NOTE:
If the battery is extremely low, you may be unable to power on
the phone even when it is being charged. In this case, try again
after charging the phone for at least 30 minutes. Contact the
customer service if you still cannot power on the phone after
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