For us, the speakers that amazed us the most with its battery life were Bose, Ultimate Ears, and Turtlebox. You also want to look at how the battery holds power over time. Will the hours slowly but surely dwindle down following a yr of use? Two years? We tested https://www.bluetoothspeaker.top/high-power-loud-big-bluetooth-megaphone-bullhorn-rechargeable-battery-portable-speaker/