144
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.
You have to account for all of the additional hardware that is required to enable swapping of batteries. Have you ever picked up an EV battery they are incredibly heavy and huge. I really can't see how you would do it without using the kind of engine lifting equipment that mechanics have.
I can't see it as practical or safe to allow general members of the public to use them. Even if you can pick them up, which you can just about do, you would seriously risk injuring your back.