16[ 146 ]Note that a new battery's full performance is achieved only after two orthree complete charge and discharge cycles!The battery can be charged and discharged hundreds of times but it willeventually wear out. When the operating time (talk-time and standbytime) is noticeably shorter than normal, it is time to buy a new battery.Use only batteries approved by the phone manufacturer and rechargeyour battery only with the chargers approved by the manufacturer.Unplug the charger when not in use. Do not leave the battery connectedto a charger for longer than 72 hours, since overcharging may shorten itslifetime. If left unused, a fully charged battery will discharge over time.Temperature extremes can affect the ability of your battery to charge.Battery will not charge at temperatures above 140°F (60°C).• CHARGERS AND OTHER ACCESSORIESCheck the model number of any charger before use with this device. Thisdevice is intended for use when supplied with power from the deviceslisted on the following pages.Warning: Use only batteries, chargers, and accessories approvedby Nokia for use with this particular phone model. The use of anyother types may invalidate any approval or warranty applying tothe phone and may be dangerous.For availability of approved accessories, please check with your dealer.When you disconnect the power cord of any accessory, grasp and pull theplug, not the cord.Learn about chargers and other accessoriesThis section provides information about the phone’s chargers and accessories.Be aware that the information in this section is subject to change as thechargers and accessories change.