The AirPods are independent of one another, but they fit into one case to charge. So, the case charges both the AirPods at the same time. If you want to charge

The AirPods are independent of one another, but they fit into one case to charge. So, the case charges both the AirPods at the same time. If you want to charge the case, you use Lightning to charge it. But, the case is good for 24 hours of charge on the AirPods. Whether that is 24 hours total (so 12 hours each), or 24 hours for both I don't know.