While in use(in conversation)20Setup (Handset)For fax advantage assistance, call 1-800-435-7329.Up to about 8 hoursUp to about 21 daysWhile not in use(stand-by/off the main unit)Battery chargePlace the handset on the cradle of the main unit forabout 4 hours.l The CHARGE light will turn on.HandsetCharge contactsCHARGE lightDisplayNote:l Clean the handset and the main unitcharge contacts with a dry cloth once amonth, or the battery may not chargeproperly (p. 104).l The battery cannot be overcharged.Automatic security code settingWhenever you place the handset on the mainunit, the unit will automatically select one of amillion security codes. These codes help to avoidunauthorized use of your telephone line byanother cordless telephone.Battery lifeIf your Panasonic battery is fully charged, thebattery life will be as follows.Note:l Battery life may vary depending on usageconditions and ambient temperature.(flashing)Display promptFully chargedMediumLowNeeds to be recharged.Battery strengthBattery strengthYou can check the present battery strength on thedisplay while the handset is on the main unit,while it is in use (making/answering a call etc.), orafter viewing the Caller ID List, programming, etc.The battery strength indicator will remain on forabout 5 seconds after using the handset, then thedisplay will return to the stand-by mode (see left).The battery strength is indicated as shown in thechart below.Stand-by mode(The handset is off the main unit.)The handset enters the stand-by mode after youfinish using the handset (making/answering a call,viewing the Caller ID List, etc.).Display is blank, but the handset can receivecalls.The battery life is conserved in this mode.RechargeRecharge the battery when:— the following message is displayed on thehandset,— “ ” flashes on the handset display, or— the handset beeps intermittently while it is in use.Display:l If you DO NOT recharge the handset battery formore than 15 minutes, the display will keepindicating the above message and/or “ ”will continue to flash.Recharge