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Hello DavidG, Thank you for considering Sony products! We appreciate your question and are here to assist you. The Sony WH-CH520 headphones require approximately 3 hours to fully charge from an empty battery. For a quick boost, a short 3-minute charge can provide up to 1.5 hours of playback, making it convenient when you’re on the go. For more details about the specifications, please visit: https://www.sony.com/electronics/support/wireless-headphones-bluetooth-headphones/wh-ch520/specifications Best regards, -Fred
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