21Ensure maximum battery and charger lifeAvoid charging batteries for more than a week, as overcharging may•shorten battery life.Over time, unused batteries will discharge and must be recharged•before use.Disconnect chargers from power sources when not in use.•Use batteries only for their intended purposes.•Use manufacturer-approved batteries, chargers, accessoriesand suppliesUsing generic batteries or chargers may shorten the life of your device or•cause the device to malfunction.Samsung cannot be responsible for the user’s safety when using•accessories or supplies that are not approved by Samsung.Do not bite or suck on the device or the batteryDoing so may damage the device or cause explosion.•If children use the device, make sure that they use the device properly.•When speaking on the device:Hold the device upright, as you would with a traditional phone.•Speak directly into the mouthpiece.•Avoid contact with your device’s internal antenna. Touching the antenna•may reduce the call quality or cause the device to transmit more radiofrequency than necessary.Hold the device with a relaxed grip, press the keys lightly, use special•features that reduce the number of keys you have to press (such astemplates and predictive text), and take frequent breaks.Protect your hearingExcessive exposure to loud sounds can cause hearing•damage.Exposure to loud sounds while driving may distract•your attention and cause an accident.Always turn the volume down before plugging the•earphones into an audio source and use only theminimum volume setting necessary to hear yourconversation or music.