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