I just bought this product, which is called the Anker PowerCore Fusion Power Delivery. I like it because it does double duty as a charging plug and a mobile battery.
When Amira and I are out and about, we carry at minimum one Pixel 3 and one iPhone, and at most we add to that my Pixelbook, iPad and Amira’s MacBook Pro.
The device has one USB port and one USB C port and plugs into a wall. If I find an outlet, I can plug two devices in at once, and they both charge from the power outlet. When the devices are done charging, the PowerCore Fusion Power Delivery switches to battery mode, and the outlet charges the battery.
If I don't find an outlet, I can charge two devices at once from the battery.
In battery mode, it will charge both our phones, or my iPad, but not my Pixelbook or Amira's older MacBook Pro. When she gets a new MacBook, it will charge from the battery via USB C.
The USB port uses Anker’s PowerIQ technology to identify the device, then use that device’s rapid charging protocol for fast charging.
In the past, I would walk around with a mobile battery, two cables and two plugs -- one each for USB C and Lightning. Now I can get the same capability with just this one device, plus the cables. And it fits in my pocket.