Thanks, JmoonAK, for offering to help.
If you don't mind, can I ask is if there is any issue with use while charging? The reason I ask is that the battery life of the AK240 is not quite what it was with the AK100 and AK120 and, as such, conceivably for long flights we would have charge while listening.
I look forward to your reply.
I listen to mine with it charging all day long with no issues.