Sure, there are plenty of power banks out there that can charge your iPhone.
The ability to charge up via Lightning cable, on the other hand, is a pretty rare thing — and from the looks of it, the Boost Charge Power Bank is the first to do so with Apple blessing.
Belkin new portable charger sports a Lightning port in-between two standard USBs, so it can be charged up with the same cable you use for your iPhone/iPad.
As someone who had some issues with Apple proprietary cables in the past, it something of a mixed bag — though as someone who also just came back from a week-long trip with a carry-on bag full of cables, there something to be said for only having to pack one.(I also recently discovered the hard way that Chinese airports will throw out battery packs exceeding a certain size, but that a different discussion.)The battery pack sports a 10,000mAh battery — which is nearly four times the size of what you get on the iPhone X/8 Plus.
At $60, however, it ain&t cheap.
As a quick pop over to Amazon demonstrates, you can get a lot more battery for a lot less.
If Apple MFI certification and cable consolidation mean something to you, however, this is probably your best bet.
It up for pre-order now from Belkin site.