Huawei U3900 User Manual page 26

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.
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