Charging and Discharging
Your phone is powered by a rechargeable battery.
Note that a new battery's full performance may be 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;
allow it to cool down or warm up first.
For good operation times with NiMh batteries, discharge the battery from
time to time by leaving your phone switched on until it turns itself off (or
by using the battery discharge facility of any approved accessory available
for your phone). Do not attempt to discharge the battery by any other
means.
Use the battery only for its intended purpose.
Never use any charger or battery which is damaged or worn out.
Do not short-circuit the battery. Accidental short-circuiting can occur
when a metallic object (coin, clip, or pen) causes direct connection of the
+ and - terminals of the battery (metal strips on 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.
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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 59°F and 77°F (15°C and 25°C). 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.