Apple’s recently announced that third-party manufacturers will be able to license the female Lightning port and has now added what is allowed.
Apple is apparently hoping that a large range of different accessories will move from micro-USB to the Lightning port standard, and will allow manufacturers to have the port draw power from any MFi-certified power adapter, as well as providing passthrough charging and syncing for iOS devices connected to the other side of the accessory, such as iPhones used in battery cases. The passthrough feature could also allow a dock to simultaneously charge an iPhone while also providing audio output to Lightning headphones.
Only one Lightning port will be allowed per accessory, ruling out the development of Lightning splitters or hubs. Faster charging will be possible via Lightning, however, with MFi-certified USB power adapters providing power ranging from a minimum of 1.0A to the Apple-recommended 2.4A level suitable for charging an iPad at full speed.
This is good news for Apple users, although it is one step further to Apple taking tighter control of the accessory market.