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 n185. Battery and charger informationThis device has an internal, nonremovable, rechargeable battery. Do not attemptto remove the battery from the device as you may damage the device. This deviceis intended for use when supplied with power from the following chargers: AC-3,AC-4, AC-5, and DC-4. The exact charger model number may vary depending onthe type of plug. The plug variant is identified by one of the following: E, EB, X,AR, U, A, C, or UB. The battery can be charged and discharged hundreds of times,but it will eventually wear out. Recharge your battery only with Nokia approvedchargers designated for this device. Use of an unapproved charger may present arisk of fire, explosion, leakage, or other hazard.If a battery is being used for the first time or if the battery has not been used for aprolonged period, it may be necessary to connect the charger, then disconnectand reconnect it to begin charging the battery. If the battery is completelydischarged, it may take several minutes before the charging indicator light isdisplayed.Unplug the charger from the electrical plug and the device when not in use. Donot leave a fully charged battery connected to a charger, since overcharging mayshorten its lifetime. If left unused, a fully charged battery will lose its charge overtime.Always try to keep the battery between 15°C and 25°C (59°F and 77°F). Extremetemperatures reduce the capacity and lifetime of the battery. A device with a hotor cold battery may not work temporarily. Battery performance is particularlylimited in temperatures well below freezing.Do not dispose of batteries in a fire as they may explode. Batteries may alsoexplode if damaged.Never use any charger that is damaged.Important: Battery talk and standby times are estimates only anddepend on network conditions, features used, battery age andcondition, temperatures to which battery is exposed, and many otherfactors. The amount of time a device is used for calls will affect its standby time.Likewise, the amount of time that the device is turned on and in the standbymode will affect its talk time.