It's of course possible but and still exciting because that new battery technology they are using must be pretty good!
My smartphone lasts 2-3 days on a single charge, so this is promising.
There is another article here in the NYT today:
https://www.nytimes.com/2021/06/03/us/ufos-report.html
I would suggest having a look and reading the comments. The comments fall into two categories:
"They are possibly aliens" or "I am a scientist/astronomer and they are not alien".
What I find amusing is how now, after the US military, who have some of the best intelligence in the world, have admitted they don't know what these are and they can't rule out the possibility that they're alien, there are still people on the internet going, "they don't know, but I do".
That is exactly part of the problem with some people in our species [apart from selfishness, blinkeredness and insecurity]: "I am an expert on X and this is not possible." Fast forward many years, "ah, we said X was not possible, it actually is possible, if you look at it this way [Y] or do it this way [Z]". "n is safe [n ends up being unsafe, or the reverse]" "a and b cannot coexist [a and b end up coexisting]" etc etc ad nauseam infinitum.
One of my favourite comments from that article is this, which I agree with:
The honest truth is we are not ready to meet with other intelligence, we are barbaric and should be utterly ashamed to host a greater species. Mankind chases war and technology for more war while letting our own children die of hunger and disease every day. I would be mortified and humiliated to have to explain that to a greater species. It wouldn’t be safe for them if we cant even make our planet safe for ourselves. We are garbage and I don’t blame them for trying to keep distance with humans. If they're here, its out of concern for our planet not our species.
Just look at OCUK GD, and I'm using that as a serious case study - no joke - for how utterly selfish, mean and toxic people can be to each other. If aliens are visiting [and it's looking increasingly likely that they are], why would they involve themselves directly with us? What can we do for them? The answer is, I imagine, very little if anything. We are likely just being
monitored - maybe for their science, maybe for their amusement. In which case we would not see a disclosure in our lifetimes, just more of, "there are lots of these things, dunno where they keep coming from".
Hard evidence? A clear photo or video? "It's CGI". So that discounts any clear photo or video. People won't buy it. The only other way we could convince people that these things are alien is if they
a] introduce themselves to us
b] we somehow - by luck more than anything else - manage to shoot one down.
Can you imagine, in the case of the latter, how things would go for us then?