Nokia 1661 User Manual page 25

indicator appears on the display or before any calls
can be made.
Always switch the device off and disconnect the
charger before removing 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.
Always try to keep the battery between 15°C and 25°C
(59°F and 77°F). Extreme temperatures reduce the
capacity and lifetime of the battery. A device with a
hot or cold battery may not work temporarily.
Battery performance is particularly limited in
temperatures well below freezing.
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.
Do not dispose of batteries in a fire as they may
explode. Batteries may also explode if damaged.
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