Nokia 7210 - Manual (Page 148)

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Reference information
10 Reference information
This section provides information about your phone’s batteries, accessories,
chargers, safety guidelines and technical information. Be aware that the
information in this section is subject to change as batteries, chargers, and
accessories change.
• BATTERIES AND CHARGERS
This phone is intended for use when supplied with power from the
ACP-12U and LCH-9 chargers. Other usage could invalidate any approval
given to this apparatus and might be dangerous.
Warning:When you purchase batteries, chargers, and accessories
for your phone, use only batteries, chargers, and accessories that
have received approval from the phone’s manufacturer. The use of
any other type of phone-related hardware will invalidate any
approval or warranty applying to the phone, and could also be
dangerous. For availability of approved batteries, chargers, and
accessories, check with your dealer.
• When the battery is fully charged, the indicator will tell you that the
battery is fully charged.
• When you are not using a charger, disconnect it from the power
source. Do not leave the battery connected to a charger for more than
a week, since overcharging could shorten its lifespan. If left unused,
a fully charged battery will discharge itself over time.
Temperature extremes can affect the ability of your battery to charge.
Therefore, allow it to cool down or warm up before trying to charge it.
When the battery is running out of power and your phone only has a few
minutes of talk time remaining, a warning tone sounds and the Battery
low message appears briefly. When no more talk time is left, a warning
tone is sounded and the phone switches off.