A:Answer Hi Adie,
Thanks for the great question! Bose noise-masking sleepbuds™ will play sounds for 16 hours-two full nights of use on a single, full charge. The travel/charge case can provide one additional full charge for the sleepbuds™ if you're on the go and don't have access to a powered USB port or wall outlet. If you are having issues with your sleepbuds we would suggest reaching out to your local sleepbuds support team for assistance. Here is a link you can use.https://bose.life/2qwENj4. Regards, Tony G - Bose Support