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The exposure standard for mobile phones
employs a unit of measurement known as
Specific Absorption Rate (SAR). The SAR
limit recommended by the EU Council is
*
2.0W/kg.
SAR tests are conducted using standard
operating positions with the phone
transmitting at its highest certified power
level in all tested frequency bands. Although
the SAR is determined at the highest
certified power level, the actual SAR level of
the phone while operating can be well below
the maximum value. This is because the
phone is designed to operate at multiple
power levels so as to use only the power
required to reach the network. In general,
the closer you are to a base station, the
lower the power output of the phone.
* The SAR limit for mobile phones used by the public is 2.0
watts/kilogram (W/kg) averaged over ten grams of body
tissue. The limit incorporates a substantial margin of
safety to give additional protection for the public and to
account for any variations in measurements. The SAR
values may vary, depending on national reporting
requirements and the network band.
Precautions when using batteries
•
Never use a charger or battery that is
damaged in any way.
•
Use the battery only for its intended
purpose.
•
If you use the phone near the network's
base station, it uses less power. Talk and
standby time are greatly affected by the
signal strength on the cellular network
and the parameters set by the network
operator.
•
Battery charging time depends on the
remaining battery charge, the type of
battery, and the charger used. The
battery can be charged and discharged
hundreds of times, but it will gradually
wear out. When the operation time is
noticeably shorter than normal, it is time
to buy a new battery.
•
If left unused, a fully charged battery will
discharge itself over time.
101
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