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Nokia N81 User Manual: Battery Information; Charging And Discharging; Nokia Battery Authentication Guidelines

Nokia cell phone user guide.
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Battery information

Charging and discharging

Your device is powered by a rechargeable battery. 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. Use only
Nokia approved batteries, and recharge your battery only with
Nokia approved chargers designated for this device.
If a replacement battery is being used for the first time or if
the battery has not been used for a prolonged period, it may
be necessary to connect the charger, then disconnect and
reconnect it to begin charging the battery.
Unplug the charger from the electrical plug and the device
when not in use. Do not leave a fully charged battery
connected to a charger, since overcharging may shorten its
lifetime. If left unused, a fully charged battery will lose its
charge over time.
If the battery is completely discharged, it may take several
minutes before the charging indicator appears on the display
or before any calls can be made.
Use the battery only for its intended purpose. Never use any
charger or battery that is damaged.
Do not short-circuit the battery. Accidental short-circuiting
can occur when a metallic object such as a coin, clip, or pen
causes direct connection of the positive (+) and negative (-)
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terminals of the battery. (These look like metal strips on the
battery.) This might happen, for example, when you carry a
spare battery in your pocket or purse. Short-circuiting the
terminals may damage the battery or the connecting object.
Leaving the battery in hot or cold places, such as in a closed
car in summer or winter conditions, will reduce the capacity
and lifetime of the battery. Always try to keep the battery
between 15°C and 25°C (59°F and 77°F). 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.
Do not dispose of batteries in a fire as they may explode.
Batteries may also explode if damaged. Dispose of batteries
according to local regulations. Please recycle when possible.
Do not dispose as household waste.
Do not dismantle or shred cells or batteries. In the event of a
battery leak, do not allow the liquid to come in contact with
the skin or eyes. In the event of such a leak, flush your skin or
eyes immediately with water, or seek medical help.
Nokia battery authentication
guidelines
Always use original Nokia batteries for your safety. To check
that you are getting an original Nokia battery, purchase it from

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