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magnetic field, as this may cause internal circuit failures in the device.
Do not use this equipment during thunderstorms, so as to avoid lightning or other
injuries.
Turn off the device in a place where the use of wireless devices is expressly
prohibited.
When the device is powered by the power adapter, keep the ambient temperature
between 0°C and 45°C. When the device is powered by the battery, please use the
device in an environment with ambient temperature between -20°C and 40°C. Do
not use it outside the above temperature range. When the ambient temperature is too
high or too low, it may cause the malfunction of the device.
9.4 Environmental protection
Please comply with local laws and regulations regarding the handling of
equipment, batteries, and accessories, and support recycling operations. Do not
dispose of equipment, batteries, and accessories in the same manner with ordinary
household waste.
9.5 Precautions for explosion protection
In order to ensure the service life of this device, it must be used and maintained
in the correct manner. Do not charge it for an overly long time or charge it frequently.
Generally, it is suggested to use the device for a certain period of time after it is fully
charged. And decide whether to charge it again depending on the situation. The
specific requirements are to be complied with.
Under normal circumstances, due to the fact that the battery contains liquid
inside, long-term storage of it at low temperature will destroy the internal chemical
substances of the battery. Therefore, it is recommended that, if conditions allow, the
storage temperature should not be lower than -20°C; and an excessively high
temperature will also hinder the battery to reach its rated capacity, the general storage
temperature should not exceed 40 °C.
The normal storage temperature of rechargeable battery shall be -20°C to +40°C.
When the temperature drops below -20°C, the electrolyte in the battery will solidify,
and the internal resistance of the battery will become infinite, so that the battery will
be unusable. When the temperature e40°C, an adverse reaction occurs in the
