The battery life for these earbuds is superb. The earbud batteries have a capacity, which means you can use them for up to 5 hours without charging. That should be enough time to handle any business call or movie you want to watch on your flight or train ride. If you use the charging case, you'll enjoy extra 15 hours of playback. It's also worth noting that these earbuds are charged wirelessly, and with a USB cable, so it's easy to charge them no matter where you are. The charger itself has a fast charge feature, so you won't have to wait for hours before being able to listen again after charging.