Huawei FC8221 User Manual page 16

Keep the ambient temperature between 0°C and 45°C while

the device is being charged. Keep the ambient temperature
between -10°C to 55°C for using the device powered by a
battery.
Safety of Children
Comply with all precautions with regard to children's safety.
Letting the child play with your device or its accessories, which
may include parts that can be detached from the device, may
be dangerous, as it may present a choking hazard. Ensure that
small children are kept away from the device and accessories.
Accessories
Use the accessories delivered only by the manufacturer. Using
accessories of other manufacturers or vendors with this device
model may invalidate any approval or warranty applicable to
the device, result in the non-operation of the device, and cause
danger.
Battery and Charger
Unplug the charger from the electrical plug and the device

when not in use.
The battery can be charged and discharged hundreds of

times before it eventually wears out. When the standby time
and the talk time are shorter than the normal time, replace
the battery.
Use the AC power supply defined in the specifications of the

charger. An improper power voltage may cause a fire or a
malfunction of the charger.
Do not connect two poles of the battery with conductors,

such as metal materials, keys, or jewelries. Otherwise, the
battery may be short-circuited and may cause injuries and
burns on your body.
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