These are Honda's concept Mobile Power Packs.
They are small, 1KWh battery packs that can be used to power a desktop, as seen here.
But, Honda says in the future they may wind up powering small EVs, like scooters.
When used in a pair like this, you could swap one without losing power.
The connectors on the bottom mean you can just pick these up and drop them into place.
iPhone 5C running low on juice? You're good.
A key part of the solution is the swapping station.
Just bring your depleted battery here...
...drop it in the machine...
...and take another, fully charged one out!
The Mobile Power Packs are still in testing, but will be seen in the wild starting next year.