What Can I Do If My Phone Can't Properly Display The Battery Level - Huawei P8 Faq

15.6 What can I do if my phone can't properly display the
battery level?
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15.7 What can I do if my phone fails to be charged?
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15.8 Why are time and date settings reset after I reinstall
the battery?
Your phone's main board may have insufficient power when the battery is removed. This can
cause date and time settings to be reset next time you turn on your phone. Please reconfigure
the date and time manually.
It is recommended that you use network-provided values. If this is enabled, your phone will
automatically retrieve network time values after connecting to a network.
Go to the Settings screen, select Date & time and enable Automatic date & time and
Automatic time zone.
15.9 How do I preserve my phone's battery?
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Restart your phone or back up important data and restore your phone to its factory
settings.
Update your phone to the latest version.
If the problem persists, replace the battery if it is removable or take your phone with the
purchase invoice to an authorized Huawei service center.
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 USB cable or power socket, or restart your phone.
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 overheated.
Don't 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. For example, if the charger that comes with your phone
outputs 1 A current and the current output by the power bank is smaller or larger than 1 A,
charging failures will occur. If the output current matches that of your phone's charger
and the problem persists, use the data cable that comes with your phone to connect your
phone to the power bank and try again.
Use your phone's battery from time to time. If it is not used for more than half a year, its
capacity will be significantly reduced.
Use the charger that comes with your phone to charge the battery.