It will last more than 24 hrs in standby mode, listening for voice commands. And if you turn it all the way off for storage, travel, or battery financial savings, it will very last a month or even more. The Sonos Roam is the one speaker we tested that's https://www.bluetoothspeaker.top/high-power-bt-speaker-wireless-stereo-subwoofer-music-player-bluetooth-speaker/