Zte Axon 7 Mini User Manual page 13

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, the phone may not power on even
while charging. In this case, charge the phone at least for 20
minutes before trying to power on again. Contact the customer
service if you still cannot power on the phone after prolonged
charging.
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