JBL Professional Dual Battery Charger for EON ONE CompactJBL Professional Dual Battery Charger for EON ONE Compact Play more sets, teach more classes and keep the party going all night long when you extend the performance time of your EON ONE Compact system with extra batteries. The JBL EON ONE Compact Dual Battery Charger quickly charges one or two EON ONE Compact lithium ion rechargeable batteries; full charge is complete in just 3. 5 hours for one battery and 7 hours when charging two batteries. LEDs