Huawei G2157 User Manual page 21

Clearing and Maintenance
The device, battery, and charger are not water-resistant

Keep them dry. Protect the device, battery and charger from
water or vapor. Do not touch the device and charger with a
wet hand. Otherwise, it may lead to short-circuit or
malfunction of the device and electric shock to the user.
Do not place your device, battery, or charger in places where

it can get damaged because of collision. Otherwise, it may
lead to battery leakage, device malfunction, overheating, fire,
or explosion.
If the ambient temperature is considerably low or high, the

capacity and life of the battery is reduced. When the
temperature is lower than 0℃, performance of the battery is
affected.
Do not place magnetic storage media such as magnetic cards

and floppy disks near the device. Radiation from the device
may erase the information stored on them.
Do not leave your device, battery, or charger in a very hot or

cold place. Otherwise, they may not function properly and
may lead to a fire or an explosion.
Do not place sharp metal objects such as pins near the

earpiece. The earpiece may attract these objects and hurt
you when you are using the device.
Before you clean or maintain the device, power off the device

and disconnect it from the charger.
Do not use any chemical detergent, powder, or other

chemical agents (such as alcohol and benzene) to clean the
device and the charger. Otherwise, parts of the device may
get damaged or a fire can be caused. You can clean the
device and the charger with a piece of damp and soft
antistatic cloth.
18