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This toaster-looking gadget boosts your phone’s battery in seconds
(www.theverge.com)
This is a most excellent place for technology news and articles.
Swapable batteries were common on cell phones in the 80's and 90's except no fancy machine was needed.
Some fairly recent phones even had docks that would charge your phone and a swappable battery at the same time
That's whole century.
News from 2011 about the HTC Thunderbolt dock.
and... get this: while you were swapping your battery you could drop in a swappable expansion on storage. Utter madness.
Many phones let you upgrade storage without opening it. Madness, I know.