The issue you have isn't with Li-ion -- it has one of the best volumetric energy densities of all commercially available technologies today. [0] Even experimental technologies don't promise more than 2x.
No, your issue isn't with Li-ion, your issue is with physics. As long as power draw stays within an order of magnitude of current mobile devices (note: backlights and radios put a hard lower-bound on this, and devices are already approaching it asymptotically) your dream is not possible without some different technology altogether.
One of those different technologies might be remote wireless charging.
No, your issue isn't with Li-ion, your issue is with physics. As long as power draw stays within an order of magnitude of current mobile devices (note: backlights and radios put a hard lower-bound on this, and devices are already approaching it asymptotically) your dream is not possible without some different technology altogether.
One of those different technologies might be remote wireless charging.
[0]: https://upload.wikimedia.org/wikipedia/commons/c/c9/Secondar...