Huawei S7 Quick Start Manual page 13

If battery electrolyte leaks out, ensure that the electrolyte does not
touch your skin and eyes. When the electrolyte touches your skin
or splashes into your eyes, wash your eyes with clean water
immediately and consult a doctor.
If there is a case of battery deformation, color change, or
abnormal heating while you charge or store the battery, remove
the battery immediately and stop using it. Otherwise, it may lead
to battery leakage, overheating, explosion, or fire.
If the power cable is damaged (for example, the cord is exposed
or broken), or the plug loosens, stop using the cable at once.
Otherwise, it may lead to an electric shock, a short circuit of the
charger, or a fire.
Do not dispose of batteries in fire as they may explode. Batteries
may also explode if damaged.
Danger of explosion if battery is incorrectly replaced. Recycle or
dispose of used batteries according to the local regulations or
reference instruction supplied with your device.
Prevention of Hearing Damage
Using a headset at high volume can damage your hearing. To reduce
the risk of damage to hearing, lower the headset volume to a safe
and comfortable level.
Safety of Children
Keep the device and its accessories out of the reach of children.
Otherwise, they may damage the device and its accessories by
mistake, or they may swallow the small components of the device,
causing suffocation or other dangerous situations.
Maintenance
If the device is not used for a long time, power it off, and then
remove all the cables connected to it.
If any exception occurs, for example, if the device emits any
smoke or unusual sound or smell, stop using the device
immediately, power it off, remove all the cables connected to it,
and then contact an authorized service center.
If the device screen is broken by colliding with hard objects, do not
touch or try to remove the broken part. In this case, stop using the
device immediately, and then contact an authorized service center
in time.
Do not trample, pull, or overbend any cable. Otherwise, the cable
may get damaged, causing malfunction of the device.
Before cleaning the device, stop using it, power it off, and then
remove all the cables connected to it.
Use a clean, soft, and dry cloth to clean the device shell. Do not
use any cleaning agent or spray to clean the device shell.
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