Black Friday Continuous music playback time: Max. 30 hours(NC ON), Max. 40 hours(NC OFF) Continuous communication time: Max. 24 hours(NC ON), Max. 28 hours(NC OFF) Battery, Up to 10 hours of surfing the web on Wi‐Fi or watching video & Up to 9 hours of surfing the web using a mobile data network. Battery, up to 18 hours of normal use, up to 36 hours in Low Power Mode Battery