Zte Max Duo LTE, User Manual

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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.
Extending the Battery Life
Active applications, screen brightness levels, Bluetooth and Wi-Fi
usage and GPS functionality can drain your battery. You can
follow the helpful tips below to conserve your battery power:
 Use the Battery saver feature in Settings.
 Reduce the screen backlight time.
 Lower the screen brightness.
 Turn auto-sync, Wi-Fi, and Bluetooth off when not in use.
 Disable the GPS function when not in use. Most applications
using this function will periodically query the GPS satellites
for your current location; each query drains your battery.
This device contains a non-removable battery.
Attempting to remove will void your warranty and could
cause serious injury. Do not damage, alter, or try to
remove the battery.