Explains how to charge the JBL Xtreme 1 through its DC input port and the included 19 volt adapter. How to Charge JBL Xtreme 1: Summary In short, first, we suggest that you charge the Xtreme 1 with the included JBL charger. Why? Because this charger meets the speaker’s current needs, and is provided by … Continue reading How to Charge JBL Xtreme 1