Sit down one day and listen to music 4 hours straight. It's a long time...Take a 2 hr. break to charge and enjoy again for another 4. Additionally, WA8 can play while charging and the audio circuit is powered by the battery so no sonic loss.
We were unable to duplicate the issue with the other two WA8s on display. We're looking into why that one unit had the issue with our MacBook Air. The show units are pre-productions. We are scheduled to begin production in early April, shipping mid April.