Cleaning And Maintenance - Huawei U3900 User Manual

Do not drop the device or battery. If the device or battery is

dropped, especially on a hard surface, and may be damaged.
If the device standby time shortens significantly, replace the

battery.
Use the battery only with a charging system that is IEEE-Std-

1725 standard qualified. The use of an unqualified battery or
charger may lead to fire, explosion, leakage, or other hazards.
Replace the battery only with an IEEE-Std-1725 standard

qualified battery. The use of an unqualified battery may lead to
fire, explosion, leakage, or other hazards.
Do not disassemble or open, crush, bend or deform, puncture

or shred the battery. Otherwise, it may lead to electrolyte
leakage, overheating, fire, or explosion.
Do not solder battery poles or dismantle the battery. Doing so

may lead to electrolyte leakage, excessive heat, fire, or
explosion.

Cleaning and maintenance

Keep the device and accessories dry. Do not attempt to dry it

with an external heat source, such as a microwave oven or hair
dryer.
Do not expose your device or accessories to extreme heat or

cold. These environments may interfere with proper function
and may lead to fire or explosion.
Avoid collision, which may lead to device malfunctions,

overheating, fire, or explosion.
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