The Boost Charge Power Bank from Belkin is the fist power bank that has the ability to charge by Lightning cable which has been given the Apple blessing.
The portable charger has the Lightning port set between two standard USBs.
The battery size is of 10,000mAh, which is four times the size of what you would normally get on the iPhone X or the 8 Plus.
The only problem with it is the fact that is costs $60, so it depends on how bad you have to have the Apple MFI certification and if your need for cable consolidation is justified.
The power bank is up for pre-order for now on the Belkin website.