I know that Apple released the Lightning spec for hooking up headphones to the lightning port on the iPhone and I know that Apple recently opened up lightning passthrough for uses like phone battery cases... but I'm wondering if there are any bluetooth headphones out there that charge with a lightning cable instead of a micro usb cable? Just trying to limit the number of cables to have keep in-stock. I would imagine/expect a pair of Beats headphones to get this at some point.