Health and safety information21Precautions when using batteries• Never use any charger or battery that is damagedin any way.• Use the battery only for its intended purpose.• If you use the phone near the network’s basestation, it uses less power; talk and standby timeare greatly affected by the signal strength on thecellular network and the parameters set by thenetwork operator.• Battery charging time depends on the remainingbattery charge, the type of battery and the chargerused. The battery can be charged and dischargedhundreds of times, but it will gradually wear out.When the operation time (talk time and standbytime) is noticeably shorter than normal, it is timeto buy a new battery.• If left unused, a fully charged battery willdischarge itself over time.• Use only Samsung-approved batteries andrecharge your battery only with Samsung-approved chargers. When a charger is not in use,disconnect it from the power source. Do not leavethe battery connected to a charger for more than aweek, since overcharging may shorten its life.• Extreme temperatures will affect the chargingcapacity of your battery: it may require cooling orwarming first.• Do not leave the battery in hot or cold places, suchas in a car in summer or winter conditions, as youwill reduce the capacity and lifetime of the battery.Always try to keep the battery at roomtemperature. A phone with a hot or cold batterymay temporarily not work, even when the batteryis fully charged. Li-ion batteries are particularlyaffected by temperatures below 0 °C (32 °F).• Do not short-circuit the battery. Accidental short-circuiting can occur when a metallic object (coin,clip or pen) causes a direct connection between the+ and – terminals of the battery (metal strips onthe battery), for example when you carry a spare