Since the control buttons are white over a black subject, they’re straightforward to see even in dim light. Connie Park/NYT Wirecutter For all 25 speakers we tested, the average battery life was somewhat under seventeen hrs. The Sony Ult Discipline seven wins the title for best battery life (thirty https://www.bluetoothspeaker.top/wireless-12-hour-playtime-led-rgb-bluetooth-speaker-for-mobile-phone/