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3-4 hours
Sorry, there was a problem. Please try again later.Hi Kris, Thanks for reaching out! The charging time completes in about 5 hours (time that is required to charge the empty built-in battery to its full capacity when the speaker turns off) when using the recommended USB AC adaptor (commercially available, not supplied) that is capable of delivering an output current of 1.5 A. Please note: • The charging time may vary depending on the ambient temperature or the usage of the speaker. • As long as the speaker is connected to an AC outlet by a USB AC adaptor (commercially available, not supplied) or to a computer that comes equipped with a USB charging port, the speaker's built-in battery is capable of charging itself even while music playback from the speaker is in progress. However, it may take a long time before charging completes depending on the usage of the speaker. It is recommended that you turn off the speaker before battery charging. For more details, check out the following link: https://helpguide.sony.net/speaker/srs-xb33/v1/en/contents/TP0002800280.html I hope you find this information to be helpful! Thank you! - Romeo
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