When your JBL Charge 5 won’t turn ON unless plugged in, this likely means one or more things. One or more of the following issues can cause this. The JBL Charge 5 is defective. The battery is faulty. The charger is defective. Or, service mode is active. So, assuming that the speaker is still okay, … Continue reading JBL Charge 5 Won’t Turn ON Unless Plugged In