Zte MF971L Let's Get Started page 18

Only qualified personnel can dismantle and repair the
y
device.
The humidity between 5% and 95% is recommended.
y
Do not connect the charger while using the device for
y
a long period. Failing to do so will trigger the protection
mechanism of the battery, and the battery will not be
charged. If you want to charge the battery, please
reconnect the charger.
Do not connect the charger while using the device for
y
a long period or use the device and battery in non-
operating temperature. Failing to do so will shorten
battery life or cause battery swelling or leakage. If the
battery shows signs of swelling or leakage, please stop
use immediately.
For pluggable equipment, the socket-outlet shall
y
be installed near the equipment and shall be easily
accessible.
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