Headphone Offers 7.5 hrs (earbuds) + 7.5 hrs (charging case), total 15 hrs when using Noise Cancelling and Bluetooth connection.10 hrs (earbuds) + 10 hrs (charging case), total 20 hrs when using Bluetooth connection with Noise Cancelling switched off. Battery, Maximum music play time with ANC off (hours) 65 Maximum music play time with ANC on (hours) 50 Maximum play time (hours) 65 Maximum talk time (hours) 33 Battery, up to 40 hours Battery