Charge and discharge
The back-up battery can be used hundreds of times but it will eventually
wear out. When the usage time is noticeably shorter than normal, buy a
new battery. Use only Nokia approved batteries.
If left unused, a fully charged battery will lose its charge over time.
Temperature extremes can affect the ability of your battery to charge.
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
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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 will reduce the capacity and
lifetime of the battery. 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! Dispose of batteries according to
local regulations. Please recycle when possible. Do not dispose as
household waste.