For us, the speakers that impressed us the most with its battery life ended up Bose, Ultimate Ears, and Turtlebox. Additionally you want to take into consideration how the battery holds power around time. Will the several hours slowly dwindle down following a calendar year of use? Two years? https://www.bluetoothspeaker.top/new-speaker-box-hifi-subwoofer-outdoor-waterproof-wireless-bluetooth-speakers/