Explains how to read the JBL Wonderboom 3 battery level sounds. When you press the right buttons while the 3 is running, it emits one or more sound pulses to tell you how full the battery is, as described below. JBL Wonderboom 3 Battery Level Sounds: Reading Them Step by Step 1. First, Boot Up … Continue reading JBL Wonderboom 3 Battery Level Sounds