The battery onboard lasts around 12 hours. Not the best from the list, but perfect for an entire working day of listening �?check out the Tribit XSound Plus 2 If you'd like some thing with longer battery life with the same sort of cost (though It really is bulkier). https://www.bluetoothspeaker.top/original-wireless-speaker-outdoor-with-ip67-waterproof-bluetooth-speakers/