Burst audio earbuds come with 5-7 hours of playback time and advanced charging cases. The charging case is sturdy and keeps the earbuds safe. The charging case has a capacity of 2000 mAh and can be also used to charge iPhones. Lithium-ion provides a good 5+ hours of battery backup as per burst audios wireless earbuds review. https://itsgadget.com/burst-audios-wireless-earbuds-review/Burst audio earbuds come with 5-7 hours of playback time and advanced charging cases. The charging case is sturdy and keeps the earbuds safe. The charging case has a capacity of 2000 mAh and can be also used to charge iPhones. Lithium-ion provides a good 5+ hours of battery backup as per burst audio...See more