Nokia 9290 User's Guide download pdf (Page 308)

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Reference information

Battery safety

Charging and Discharging

Your phone is powered by a rechargeable battery.

Note that a new battery's full performance is achieved only after two or three

complete charge and discharge cycles!

The battery can be charged and discharged hundreds of times but it will eventually

wear out. When the operating time (talk-time and standby time) is noticeably

shorter than normal, it is time to buy a new battery.

Use only batteries approved by the phone manufacturer and recharge your battery

only with the chargers approved by the manufacturer. Unplug the charger when

not in use. Do not leave the battery connected to a charger for longer than a week,

since overcharging may shorten its lifetime. If left unused, a fully charged battery

will discharge itself over time.

Temperature extremes can affect the ability of your battery to charge.

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 phone with a hot or

cold battery may temporarily not work, even when the battery is fully charged.

Batteries' performance is particularly limited in temperatures well below freezing.

Do not dispose of batteries in a fire!

Dispose of batteries according to local regulations (for example, recycling). Do not

dispose as household waste.

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Nokia 9290 User's Guide Page 308