Battery type: Rechargeable Li-ion Cell
Battery capacity: 58mAh (earbuds) /440mAh (charging case)
Music play time (AAC, Default setting, 50% volume)*: Max Noise Cancellation: 5.5 h (earbuds), 20 h (earbuds + charging case), Noise Cancellation Off: 12 h (earbuds), 44 h (earbuds + charging case)