Play more sets, teach more classes, elevate your activations and keep the party going all night long when you extend the performance time of your EON ONE Compact system with extra swappable batteries. n nThe JBL EON ONE Compact Dual Battery Charger quickly charges one or two EON ONE Compact lithium-ion rechargeable batteries. n nFull charge is complete in 3.5 hours for one battery or 7 hours when charging two batteries. LEDs indicate charging status.