A:Answer You can play the JBL Partybox 310 at full blast, the only thing that will be affected by playing the JBL Partybox 310 at full volume is the playtime, as the longevity of the battery is dependent on the volume and music content you're playing. However, you can use it while it is plugged in. To learn more about this unit here's the service manual link: https://bit.ly/3GGQSZp