Huawei U7520 User Manual - Page 12

indicator blinks continuously.

Page 12 highlights

*OUSPEVDUJPO • When the battery level is very low, the phone plays an alert sound and displays a prompt. When the battery level is extremely low, the phone will power off automatically. Before charging the battery, ensure that the battery has been properly loaded into your phone. 1. Connect the USB connector of the USB cable to the travel charger. 2. Connect the travel charger to a power socket. 3. Connect the mini USB connector of the USB cable to the charge port of your phone. When the battery is being charged, the charging indicator blinks continuously. 4. When the charging indicator stops blinking, it indicates that the battery is fully chaged. Disconnect the charger from the power socket. 5. Disconnect the USB cable from the phone. 

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4
Introduction
When the battery level is very low, the phone plays an alert sound and
displays a prompt. When the battery level is extremely low, the phone
will power off automatically.
Before charging the battery, ensure that the battery has been properly
loaded into your phone.
1.
Connect the USB connector of the USB cable to the travel charger.
2.
Connect the travel charger to a power socket.
3.
Connect the mini USB connector of the USB cable to the charge port
of your phone. When the battery is being charged, the charging
indicator blinks continuously.
4.
When the charging indicator stops blinking, it indicates that the battery
is fully chaged. Disconnect the charger from the power socket.
5.
Disconnect the USB cable from the phone.