This Bluetooth speaker has a group of LEDs behind a translucent white bar in its front lower area. This Charging Indicator bar on the JBL Boombox 2 displays battery status and shows whether it’s draining or charging. How to Read the JBL Boombox 2 Charging Indicator 1. The Charging Indicator is Entirely Dark When you … Continue reading JBL Boombox 2 Charging Indicator