Since the control buttons are white with a black subject, they’re simple to see even in dim light. Connie Park/NYT Wirecutter For all twenty five speakers we tested, the average battery life was slightly under 17 hrs. The Sony Ult Industry seven wins the title for best battery life https://www.bluetoothspeaker.top/bt-multi-function-wireless-charging-light-call-function-bluetooth-speaker/