Based on our test, the earbuds (fully charged) can last for 2.5-3 hours under the 50% volume circumstance, environment temperature is 65°F ~ 75°F.

and Touchwave provides about 3 hours of battery life on each side when fully charged. When you put them in the portable charge box they will charge automatically, you can get up to 12 hours of playback time in extremely good conditions.