Why Does My Charger Emit High-Frequency Noise In A Quiet Environment - Huawei P8 GRA-UL00 Faqs

P8 Smartphone FAQs
15.19 Why does my charger emit high-frequency noise in a
quiet environment?
Your 2 A charger has passed the safety standard test. The high-frequency noise is caused by
the internal transformer, which does not affect the normal use of your charger.
15.20 What can I do if my phone generates excessive heat
during standby time?
1. Make sure your WeChat version is 6.0 or later than 6.1 (not including 6.1). Uninstall 360
Safe if any.
2. Go to Settings > Power saving > Background power-intensive apps and check for
power-intensive applications that are marked red. Close or uninstall them if you do not need
them.
To determine whether your phone is fully charged:
 If you are charging your phone when it is powered on, press the power button to turn on the screen. If the battery icon on
 If you are charging your phone when it is powered off, press the power button to turn on the screen. If the charging indicator
Note: The figures are for your reference only. The actual screens may vary.
15.21 What can I do if my phone can't properly display the
battery level?
Restart your phone or back up important data and restore your phone to its factory settings.
If the problem persists, replace the battery if it is removable. If the battery is non-removable,
contact an authorized Huawei service center.
15.22 What can I do if my phone fails to be charged?
 If the battery power is completely used up, connect your phone to the charger and wait for 5 minutes.
 Use the charger provided with your phone. If the charging failure occurs when you use the standard charger, replace the
 Your phone may fail to be charged if it is overheated.
 Your phone adopts an over temperature protection design that disables charging if your phone is overheating.
 Do not play games, watch videos, or use other power-intensive applications while charging.
 If you are using a power bank to charge your phone, check that the output current matches that of your phone's charger.
Issue 01 (2015/03)
the status bar becomes
becomes 100%, your phone is fully charged.
USB cable or power socket, or restart your phone.
For example, if the charger that comes with your phone outputs 1 A current and the current output by the power bank is
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15 Battery, charging, and power consumption
, or "Charged" is displayed on the lock screen, your phone is fully charged.
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