Covers How to Check Battery Percentage On JBL Wonderboom 1, and also, how to know if the battery life is shortening over time. How to Check Battery Percentage On JBL Wonderboom 1: Step by Step 1. First, Turn ON the JBL Wonderboom 1 You won’t be able to read battery charge status unless the speaker … Continue reading How to Check Battery Percentage On JBL Wonderboom 1