B a t t e r y a n d C h a r g e r I n f o r m a t i o n7711. Battery and Charger InformationYour device is powered by a rechargeable battery. The battery intendedfor use with this device is BL-5C 1020 mAh Li-Ion battery. This device isintended for use when supplied with power from the following chargers:AC-6U travel charger. The battery can be charged and dischargedhundreds of times, but it will eventually wear out. When the talk andstandby times are noticeably shorter than normal, replace the battery.Use only Nokia approved batteries, and recharge your battery onlywith Nokia approved chargers designated for this device. Use of anunapproved battery or charger may present a risk of fire, explosion,leakage, or other hazard.If a battery is being used for the first time or if the battery has not beenused for a prolonged period, it may be necessary to connect the charger,then disconnect and reconnect it to begin charging the battery. If thebattery is completely discharged, it may take several minutes before thecharging indicator appears on the display or before any calls can be made.Always turn the device off and disconnect the charger before removingthe battery.Unplug the charger from the electrical plug and the device when not inuse. Do not leave a fully charged battery connected to a charger, sinceovercharging may shorten its lifetime. If left unused, a fully chargedbattery 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. Batteryperformance is particularly limited in temperatures well below freezing.Do not short-circuit the battery. Accidental short-circuiting can occurwhen a metallic object such as a coin, clip, or pen causes direct connectionof the positive (+) and negative (-) terminals of the battery. (These looklike metal strips on the battery.) This might happen, for example, whenyou carry a spare battery in your pocket or purse. Short-circuiting theterminals may damage the battery or the connecting object.