Charger Safety; Battery Safety - Huawei U3900 User Manual

Charger safety

For pluggable devices, the socket-outlet shall be installed near

the devices and shall be easily accessible.
Unplug the charger from electrical outlets and the device when

not in use.
Do not drop or cause an impact to the charger.

If the power cable is damaged (for example, the cord is

exposed or broken), or the plug loosens, stop using it at once.
Continued use may lead to electric shocks, short circuits, or fire.
Do not touch the power cord with wet hands or pull the power

cord to disconnect the charger.
Do not touch the device or the charger with wet hands. Doing

so may lead to short circuits, malfunctions, or electric shocks.
If your charger has been exposed to water, other liquids, or

excessive moisture, take it to an authorized service center for
inspection.
Ensure that the charger meets the requirements of Clause 2.5

in IEC60950-1/EN60950-1 and has been tested and approved
according to national or local standards.
Connect the device only to products with the USB-IF logo or

with USB-IF compliance program completion.

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.
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