Section 4A: Important Safety Information 187Important Safety InformationHearing Aid CompatibilityThis device model complies with the requirements of the FCC rules governinghearing aid compatibility. Device models meeting these requirements havean M3 microphone or higher rating. The M-rating, shown on the device,refers to lower RF emissions levels. A higher M-rating generally indicatesthat a device model has a lower RF emissions level which may improve thelikelihood that the device will successfully operate with certain hearingaids. Some hearing aids are more immune than others to interference.Please consult your hearing health professional to determine the M-ratingof your hearing aid and whether your hearing aid will work with thisdevice. More information can be found at www.nokiaaccessibility.com/.Caring for the BatteryYour phone is powered by a rechargeable battery. The full performanceof a new battery is achieved only after two or three complete charge anddischarge cycles. The battery can be charged and discharged hundreds oftimes, but will eventually wear out. When the talk and standby times arenoticeably shorter than normal, replace the battery. Use only Nokia-approvedbatteries, and recharge your battery only with Nokia-approved chargersdesignated for this phone.Protecting Your BatteryThe guidelines listed below will help you get the most out of yourbattery’s performance. Recently, there have been some public reports of wireless phone batteriesoverheating, catching fire or exploding. It appears that many, if not all,of these reports involve counterfeit or inexpensive, aftermarket-brandbatteries with unknown or questionable manufacturing standards.Nokia is not aware of similar problems with Nokia phones resultingfrom the proper use of batteries and accessories approved by Nokia.Use only approved batteries and accessories found through Nokia.Buying the right batteries and accessories is the best way to ensurethey’re genuine and safe. In order to avoid damage, charge the battery only in temperatures thatrange from 32° F to 113° F (0° C to 45° C). Don’t use the battery charger in direct sunlight or in high humidityareas, such as the bathroom. Never dispose of the battery by incineration. Keep the metal contacts on top of the battery clean. Don’t attempt to disassemble or short-circuit the battery. The battery may need recharging if it has not been used for a longperiod of time.