Device Layout2If there is sweat or liquid on the charging contacts, corrosion may occur on theearbuds. Clean the charging contacts and earbuds before storing the earbuds in thecharging case.BatteryCharge the batteryFully charge the battery before using the earbuds for the first time or when they have beenunused for extended periods. The earbuds will power on while charging. When the battery iscompletely discharged, it needs at least 20 minutes to turn on.The charging case, which has a built-in battery, is charged along with the earbuds. You cancharge the earbuds by placing them into the charging case without connecting to an electricsocket.Charging head for plugging USB cable into wall outlet is not included. Use onlySamsung charging devices rated with an output voltage of 5v and an output currentof over 500mA (sold separately). Samsung accessories are designed for your device tomaximize battery life. Using other accessories may invalidate your warranty and maycause damage.• You cannot use your earbuds’ wireless features while charging the battery.• When there is sweat or liquid on the charging terminal or earbuds, cleanthem before charging the battery.