Black Friday 12.4 hours of mixed use (4850 + DBMD4 DSP) Battery, Approximately 100 (from full charge) *The number of prints depends on the usage conditions. 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