A new Apple Patent filing reveals the use of a new Bimodal Reverse Recharging System on a Future iPhone to recharge accessories+
It's been rumored off and on again that Apple will someday provide reverse charging for an iPhone that could recharge accessories. Last Thursday, the US Patent & Trademark Office published a patent application from Apple that relates to a new wireless charging system using bimodal magnetic alignment components for alignment of devices.
Source: patentlyapple.com