The battery onboard lasts as many as 12 hours. Not the best from the list, but perfect for an entire working day of listening �?check out the Tribit XSound Plus 2 In order for you some thing with longer battery life for that same kind of cost (even though https://www.bluetoothspeaker.top/wireless-bluetooth-speaker-with-ip67-waterproof-and-usb-charge-out/