The JBL Boombox 1 has a row of LEDs across its lower front panel. These display battery fullness and charging status. In short, the JBL Boombox 1 battery indicator shows how full the battery is whether charging or not. How to Read the JBL Boombox 1 Battery Indicator Lights 1. All LEDs OFF When you … Continue reading JBL Boombox 1 Battery Indicator