10Charging batteryWhen charging the battery for the firsttime, it is necessary to leave thehandset in the charger for 14-16hours for the battery to be fullycharged.During normal operation, it takesapproximately 3.5 hours to charge thehandset from fully discharged to itsfull capacity.• Place the handset in the charger.For correct charging, be sure theroom temperature is between 0°Cand 25°C. Do not place thehandset in direct sunlight. Thebattery has a built-in heat sensorwhich will stop charging if thebattery temperature is too high.