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, Multi-day battery life, up to 36 hours of normal use, Up to 72 hours in Low Power Mode 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