Sony SGP311U1/B, Important Information Manual

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power supply is connected there is a small drain of power. To
avoid this small energy waste, disconnect the power supply
when the product is fully charged. Use of charging devices
that are not Sony branded may pose increased safety risks.
Battery
New or idle batteries can have short-term reduced capacity.
Fully charge the battery before initial use. Use for the intended
purpose only. Charge the battery in temperatures between
+5°C(+41°F) and +45°C(+113°F). Do not put the battery into
your mouth. Do not let the battery contacts touch another
metal object. Turn off the product before removing the battery.
Performance depends on temperatures, signal strength, usage
patterns, features selected and voice or data transmissions.
Only Sony service partners should remove or replace built-in
batteries. Use of batteries that are not Sony branded may
pose increased safety risks. Replace the battery only with
another Sony battery that has been qualified with the product
per the standard IEEE-1725. Use of an unqualified battery may
present a risk of fire, explosion, leakage or other hazard.
Personal medical devices
Mobile devices / devices with radio transmitters may affect
implanted medical equipment. Reduce risk of interference by
keeping a minimum distance of 15 cm(6 inches) between the
Sony product and the medical device. Use the Sony device at
your right ear, when applicable. Do not carry the device in
your breast pocket. Turn off the device if you suspect
interference. For use in proximity to personal medical devices,
please consult a physician and the device manufacturer.
Driving
In some cases, vehicle manufacturers may forbid the use of
mobile devices in their vehicles unless a handsfree kit with an
external antenna supports the installation. Check with the
vehicle manufacturer's representative to be sure that a mobile
device or Bluetooth handsfree will not affect the electronic
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