[ 6 ]• If the battery is totally empty, it may take a few minutes before youcan make and receive calls, and before the charging indication appearson the display. For more information about specific chargers, seepages 98-100.• If the phone is switched on when charging is completed, Battery fullis displayed on the screen momentarily.• Unlike NiMH batteries, the BLS-2S Li-Ion battery does not need to befully discharged before recharging.• Charging time depends on the charger and battery used. For example,the charging time for the BLS-2S battery with the ACP-8U chargertakes about 2 hours. See page 96 for charging times.• Removing the batteryIt is necessary to remove the existing battery if you purchase (and wantto use) a different battery model, or have purchased a spare battery.To remove the battery:1. Make sure the phone has been turned off for 10 seconds.2. While holding the phone by the display (and not on the slide mechanism),press and hold the battery release button.3. Slide the battery downward and away from the antenna.4. Remove the battery from the grooved back of the phone.Prolonging battery lifeA NiMH battery lasts longer and performs better if you fully discharge itfrom time to time. To discharge your battery:• Leave your phone switched on until the battery is drained. Ignore anymessages to recharge your battery.• Use the battery discharge feature of any approved accessory availablefor your phone.Note: Do not attempt to discharge the battery by any means other thanthose just described.