The average battery life of a single BATTERYBOKS 2 is approximately 40 hours, which includes playing at both low and medium. This will typically be enough for a whole weekend on a cabin trip, festival, etc.
The SOUNDBOKS 2 does not use a fixed amount of power but uses more power when you turn up the volume or play aggressive house/dance music with a lot of bass. Therefore the battery life in hours may vary from time to time, depending on the music you play and how loud you play it. For instance, if you only play music below half of maximum volume, you can expect up to 100 hours of battery life.