Black Friday All‑day battery life, up to 18 hours of normal use,Up to 36 hours in Low Power Mode Battery, Approximately 100 (from full charge; number of prints depends on the usage conditions.) Approximately 1.5 to 2.0 hours (depending upon environment temperature at time of charging) Battery, 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