JBL EON ONE Dual Charger For EON One MK2Play more sets, teach more classes and keep the party going all night long when you extend the performance time of your EON ONE MK2 system with extra batteries. The JBL EON ONE MK2 Dual Battery Charger quickly charges one or two EON ONE MK2 lithium ion rechargeable batteries; full charge is complete in less than 3 hours for one battery and less than 6 hours when charging two batteries. Specifications Charge Time: 1 battery < 3hours, 2 batteries < 6