This isn't ebike-related but. One of the issues with flying an RC aircraft is that you'd only have acertain distance that it could fly, regardlkess of the amount of battery it held. By sending out control signals on a phone network, and receiving back a visual feed. An RC aircraft could be flown a very long distance. If the recipient had a hot-swappable battery pack, the on-board range could be one-way. Theoretically quite a distance.
https://www.youtube.com/watch?v=aO9XeZ9R0pY
[youtube]aO9XeZ9R0pY[/youtube]
https://www.youtube.com/watch?v=aO9XeZ9R0pY
[youtube]aO9XeZ9R0pY[/youtube]