The battery onboard lasts approximately 12 hours. Not the best while in the list, but perfect for an entire working day of listening �?check out the Tribit XSound Plus two If you'd like one thing with longer battery life for the same type of cost (while It is bulkier). https://www.bluetoothspeaker.top/bluetooth-speaker-ipx7-waterproof-wireless-speaker-8h-playtime/