ARMYTE Hybrid Active Noise Cancelling Headphones for Travel, Work40 Hour Playtime*: Up to 40 hours of non stop playtime in wireless active noise cancellation mode (at 60% volume) is extended to an enormous 60 hours in standard music mode. A single charge gives you enough juice to listen to over 600 songs or soundtrack multiple long haul flights. And when youre in a rush, charge Life Q20 active noise canceling headphones for 5 minutes and get 4 hours of listening.