A good general guideline would be the larger the speaker, the longer the battery life. But this isn’t always correct, matters like additional updated Bluetooth firmware versions can tremendously impact power performance, and also a large Bluetooth 4.0 speaker might not past as long while you’d expect relative to https://www.bluetoothspeaker.top/bluetooth-speaker-hifi-heavy-bass-wireless-soundbar-loudspeaker-supports-aux-tf-card-fm-radio/