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As SAR is measured utilising the device’s highest transmitting power,
the actual SAR of the device while operating is typically below the above
indicated level.
This is due to automatic changes to the power level of the device to
ensure it only uses the minimum level requested to reach the network.
While there may be differences between the SAR levels of various phones
and at various positions, they all meet the governmental requirements for
safe exposure.
The World Health Organization has stated that present scientific
information does not indicate the need for any special precaution for the
use of mobile devices. They note that if you want to reduce your exposure
then you can do so by limiting the length of calls or using a “hands-free”
device to keep the mobile phone away from the head and body.
21.2
Care and Maintenance
21.2.1 Battery and Charger Safety
1. Only use batteries approved by the phone manufacturer.
2. Your device is powered by a rechargeable battery. The full performance
of a new battery is achieved only after two or three complete charge and
discharge cycles.
3. The charging time depends on the charger and the battery used.
4. The battery can be charged and discharged hundreds of times, but it
will eventually wear out. When the talk and standby times are noticeably
shorter than normal, replace the battery.
5. If unused, a fully charged battery will lose its charge.
6. When the charger is not disconnecting it from the power source. Do not
leave the battery connected to the charger and power source for longer
then necessary as overcharging it will shorten its life.
7. Leaving the battery in hot or cold place, such as in a closed car in
summer or winter conditions, will reduce the capacity and lifetime of the
battery. A device with a hot or cold battery may not work temporarily,
even when the battery is fully charged. Battery performance is particularly
limited in temperatures well below freezing.
8. Do not short-circuit the battery. Accidental short-circuiting can occur
when a metallic object causes a direct connection between the + and –
terminals of the battery. Short-circuiting the terminals may damage the
battery or the connecting object.
9. Do not dispose of the battery in a fire.
