Nokia 2170 - Manual (Page 13)

6
Important battery information
Use only batteries and chargers approved by the phone
manufacturer.
When a charger is not in use, disconnect it from the power source.
Do not leave the battery connected to a charger for longer than a
week; overcharging may shorten its life.
If left unused, a fully charged battery may completely drain
(discharge) in 1 - 4 weeks.
Never use any charger or battery that is damaged or worn out.
Use the battery only for its intended purpose.
Do not short circuit the battery. Accidental short circuiting can
occur when a metallic object (e.g. coin, clip or pen) causes direct
connection of the two terminals of the battery (metal strips on the
back of the battery), 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, reduces the capacity and lifetime of
the battery. Always try to keep the battery between 41°F and 95°F
(5°C and 35°C). A phone with a hot or cold battery may temporarily
not work (or charge) even if the battery is fully charged. NiMH
battery performance is particularly limited in temperatures below
14°F (-10°C).
Temperature extremes affect the ability of your battery to charge:
allow it to cool down or warm up first.
When the battery is not in use, store it uncharged in a cool, dark
and dry place.
The battery is a sealed unit with no serviceable parts. Do not
attempt to open the case.
It is recommended that you allow your battery to fully discharge
before you recharge it.
The battery can be charged and discharged hundreds of times but
will eventually wear out. When the operating time is shorter than
normal, it is time to buy a new battery.
Do not dispose of a battery in a fire!
Dispose of used batteries in accordance with local regulations.
Recycle!