How the JBL Xtreme 2 Speaker performed From empty, you can fully charge the Xtreme 2 in 3.5 hours. Once it's fully charged, JBL says the portable Bluetooth speaker can last up to 15 hours.
Get ready for pulse-pounding sound and quick, intuitive controls with the JBL Xtreme 3 Portable Bluetooth Speaker, now on sale for $200.
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