Covers the Check Battery on JBL Wonderboom 2 procedure, to tell if the battery life is shortening over time. Check Battery on JBL Wonderboom 2: Step by Step 1. First, Turn ON the JBL Wonderboom 2 You won’t be able to read battery charge status unless the 2 is ON. To turn on the unit, … Continue reading Check Battery on JBL Wonderboom 2