OKay not so brief, by brief I meant briefcase here’s why if you do a search for:
Solar Powered Backpack
There are many to choose from, likely many more to be released in the near future.
Think back packs, messenger bags, sling bags, and maybe even fanny packs <yes I predict that the 90s fanny pack craze will see a rebirth in 2020s.
Fashionable Solar Clothing is Closer Than You Think:
Charge Your Smartphone On-the-Go with Tommy Hilfiger’s New Solar-Powered Jacket
So why do I bring up the future of portable solar up?
well because of the idea is to make a laptop with specs that would otherwise be only feasible in laptop form today, into a 2 in 1.
Expample, the new Dell XPS 13 is not a 2 in 1. I propose having the same performane specs as the latest Dell XPS, but as 2in1.
by considerably downsizing the battery, you allow for room to make the device flush to convert into tablet.
the dell has 20hours of battery.
ours would maybe have 2 hours, give or take.
the remaining 18hours would be found by using a portable power charger.
Either EVE could make their own, or partner with like Anker and bundle the laptop with Anker’s Powercore.
These fit nicely in your purse, sling, bag pack. One that would possibly be chargable via solar. if solar powered you might be fine with a 15 hour battery + the sunlight you’d get from the panel = +3 hours or more (idk how much solar gives you)
the BioLite Solar Panel 5 would fit easily inside a messenger bag for example.
Compact to carry with you and deploy.
Flexible/foldable panels are likely around the corner.
why do you get a laptop?
because it is easy to carry than a desktop whilst giving you a desktop like experience (particularly for non gaming uses).
Now, as a consumer I would be more than prepared to carry a battery outside of my laptop if it mean that said laptop could double as a 2 in 1.
Plus having a powercharger nowadays is super convenient for all your other devices as well. You’re gonna want to bring a powercharger with you when travelling anyways.
Your demographic would include people in the market for tablets too.
Android emulators are super popular now too, making 2 in 1s even more sought after.
Or maybe the tablet could even dual boot into android. see http://www.phoenixos.com/en/ maybe in this OS the battery could last longer too up to say 4hours.
important feature would be a more in-your-face type of alert for your last remaining minute of battery to save everything. (maybe LED that glows from green to red in the last 10 minutes and flashes red in the last 1 minute)
For portability use a retractable USB-C wire
one possibility would be to have this integrated into the 2 in 1, in the event that it breaks. This would need to be easy to replace yourself. just buy a new wire part remove old and snap + plug new in place.
Other ideas, may be pushing it though:
now maybe the back of your laptop display you could attach a solar power to the back. (would snap on easily with magnets perhaps)
would involve partnering with a solar power company, like Biolite maybe