Nokia 7390

Page 99
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B a t t e r y   i n f o r m a t i o n
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19. Battery information
■ Charging and discharging
Your device is powered by a rechargeable battery. The full performance of a 
new battery 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 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 and then disconnect and reconnect it to start the charging.
Unplug the charger from the electrical plug and the device when not in use. 
Do not leave 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 a few 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 (-) 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.
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