The battery onboard lasts around 12 hrs. Not the best in the list, but perfect for a full working day of listening �?check out the Tribit XSound Moreover 2 if you want one thing with longer battery life for the same type of cost (while It can be bulkier). https://www.bluetoothspeaker.top/bluetooth-speaker-outdoor-classic-design-waterproof-wireless-speakers-high-quality-audio-hands-free/