Covers how to check charge on JBL Wonderboom 3, and also, how to know if the charge holding capacity is shortening over time. How to Check Charge on JBL Wonderboom 3: Step by Step 1. First, Turn ON the JBL Wonderboom 3 You won’t be able to read charge status unless the unit is running. … Continue reading How to Check Charge on JBL Wonderboom 3