Zte BLADE 520 User Manual page 24

Charging the Battery
Your phone's battery should have enough power for the
phone to turn on, find a signal, and make a few calls. You
should fully charge the battery as soon as possible.
If the battery is low, there will be a pop-up message on the
screen. As you charge your phone, the lock screen will show
you the exact battery level on the status bar.
WARNING!
Use only ZTE-approved chargers and cables. The use of
unapproved accessories could damage your phone or cause
the battery to explode.
24