Sharp WX-T923 User Manual page 174

• Do not touch the battery terminals. Batteries can
cause damage, injury or burns if a conductive
material touches exposed terminals. When the battery
is detached from the phone, use a cover made of
non-conductive material for keeping and carrying the
battery safely.
• Recommended temperature for using and storing
batteries is approximately 20°C.
• The batteries' performance is limited in low
temperatures, particularly below 0°C and the phone
may not work temporarily regardless of the amount
of remaining battery power.
• Exposing the phone to extreme temperatures will
shorten battery life.
• The battery can be charged and discharged hundreds
of times but it will eventually wear out. When the
operating time (talk-time and stand-by time) is
noticeably shorter than normal, it is time to buy a new
battery.
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED
BY AN INCORRECT TYPE,
DISPOSE OF USED BATTERIES ACCORDING
TO THE INSTRUCTIONS
See "Battery Disposal" on page 17.
Aerial Care
• Do not cover the hinge area of the phone (p. 15,
No. 25) with your hand when in use as this may
interfere with the performance of the built-in aerial.
Call quality may deteriorate leading to shortened
talk-time and stand-by time because the mobile
phone has to operate on a higher power level than is
necessary.
• Use only the aerial supplied or one approved by
Sharp for your mobile phone. Using unauthorised or
modified aerials may damage the mobile phone.
Moreover, since the mobile phone may violate the
appropriate regulations, it may lose performance or
exceed the limitation of SAR levels.
• To avoid impaired performance, do not damage the
aerial of the mobile phone.
• To avoid interfering with blasting operations, please
turn off the mobile phone in a blasting area or in a
place where a "turn off two-way radio" sign is
posted.
Safety Precautions and Conditions of Use 173