Huawei B890 User Manual page 24

lead to short circuits, malfunctions, or electric shocks.
If your power adapter has been exposed to water, other liquids, or excessive

moisture, take it to an authorized service center for inspection.
Ensure that the power adapter meets the requirements of Clause 2.5 in

IEC60950-1/EN60950-1/UL60950-1 and has been tested and approved
according to national or local standards.
Battery safety
Do not connect battery poles with conductors, such as keys, jewelry, or other

metal materials. Doing so may short-circuit the battery and cause injuries or
burns.
Keep the battery away from excessive heat and direct sunlight. Do not place it

on or in heating devices, such as microwave ovens, stoves, or radiators.
Batteries may explode if overheated.
Do not attempt to modify or remanufacture the battery, insert foreign objects

into it, or immerse or expose it to water or other liquids. Doing so may lead to
fire, explosion, or other hazards.
If the battery leaks, ensure that the electrolyte does not make direct contact

with your skins or eyes. If the electrolyte touches your skins or splashes into
your eyes, immediately flush with clean water and consult a doctor.
In case of battery deformation, color change, or overheating while charging or

storing, immediately stop using the device and remove the battery. Continued
use may lead to battery leakage, fire, or explosion.
Do not put batteries in fire as they may explode. Damaged batteries may also

explode.
Dispose of used batteries in accordance with local regulations. Improper

battery use may lead to fire, explosion, or other hazards.
Do not allow children or pets to bite or suck the battery. Doing so may result in

damage or explosion.
Do not smash or pierce the battery, or expose it to high external pressure.

Doing so may lead to a short circuit or overheating.
Do not drop the device or battery. If the device or battery is dropped, especially

on a hard surface, it may be damaged.
If the device standby time shortens significantly, replace the battery.

Cleaning and maintenance
During storage, transportation, and operation of the device, keep it dry and

protect it from collision.
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.
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