We tested Bluetooth speakers with expert listeners, and we concealed the identities from the speakers to reduce bias. For all 25 speakers we tested, the average battery life was a little bit under 17 several hours. The Sony Ult Discipline seven wins the title for best battery life (30 https://www.bluetoothspeaker.top/tws-speaker-stereo-sound-bluetooth-speakers-china-factory-high-quality/