Zte Blade MAX 2s User Manual page 14

Connect the cable to the charging jack at the bottom of the phone
2. Connect the charger to a standard AC power outlet. If the
phone is on, you'll see a Charging icon, such as
charging status icon when battery is low or
charging status icon when battery is almost full, appear in 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 20 minutes.
Contact customer service if you still cannot power on the phone
after prolonged charging.
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battery
battery