Basics14Wireless chargingThe device has a built-in wireless charging coil. You can charge the battery using a wirelesscharger (sold separately).1 Place the centre of the device’s back on the centre of the wireless charger.You can check the remaining charging time on the screen. The actual remaining timemay vary depending on the charging conditions.2 After fully charging, disconnect the device from the wireless charger.• When there are foreign materials between the device and the wireless charger, thedevice may not charge properly.• If you use the wireless charger in areas with weak network signals, you may losenetwork reception.• Use Samsung-approved wireless chargers. If you use other wireless chargers, thebattery may not charge properly.Power saving modeSave the battery power by limiting the device’s functions.On the Home screen, tap Apps → Settings → Battery → Power saving mode, and then tapthe switch to activate it.To automatically activate power saving mode when the remaining battery power reaches thepreset level, tap Start power saving and select an option.