We tested Bluetooth speakers with expert listeners, and we concealed the identities from the speakers to remove bias. For all twenty five speakers we tested, the average battery life was slightly under 17 several hours. The Sony Ult Discipline seven wins the title for best battery life (30 hours). https://www.bluetoothspeaker.top/flashing-light-speaker-music-wireless-stereo-outdoor-battery-plastic-bluetooth-speaker-rgb/