55Low-Battery IndicationWhen the charge falls to approximately 5% of thebattery’s capacity, the messageBATTERY LOW isdisplayed and the phone beeps once. This warning isrepeated every five minutes if the phone is in standbymode, or every minute if in a call.When the battery is fully discharged, the messageRECHARGE BATTERY is displayed and the phonebeeps three times. The phone then switches offautomatically.Battery PerformanceBatteries will last longer and perform better if allowedto discharge fully at least once a week. You can dothis by leaving the phone switched on overnight(or longer for an Extended Battery, type BTH-8H or anUltra Extended Battery BTH-8HM), until the messageRECHARGE BATTERY is displayed and the phoneswitches off. Alternatively, you can use the deep-discharge facility if this is available on your (optional)Compact Desktop Charging Stand.StorageWhen a battery is not in use, store it uncharged in acool, dark and dry place. If left unused, a fully-charged battery will discharge itself in a few weeks atroom temperature.REFERENCE INFORMATIONLIST OF DISPLAY MESSAGESAUTO PWR OFFPhone is installed in a car kit with ignition senseconnected. When ignition is switched off, thismessage appears, and the phone will switch offautomatically in 5 seconds.BATTERY LOWAppears when battery charge is down to approximately5% of the battery’s capacity, then every 5 minutes ifphone is in standby mode, or every minute if it is in acall.