We tested Bluetooth speakers with expert listeners, and we concealed the identities of your speakers to eliminate bias. For all 25 speakers we tested, the average battery life was just a little under 17 hours. The Sony Ult Discipline 7 wins the title for best battery life (thirty hours). https://www.bluetoothspeaker.top/hot-selling-wireless-subwoofer-outdoor-speaker-portable-waterproof-bluetooth-speakers-clip4/