I'm going to have to respectfully disagree with most of you with negative comments. As much as I like this forum, many users are often too quick to jump in with harsh opinions or to pounce mercilessly on users posts and make fun or to try to discredit them.
I'm an Industrial Designer and Part-107 pilot. I have both an
Inspire2 and a Mavic Pro Platinum.
I like to see innovation. Sure, the first iterations may not be perfect but at least the thinking and development is occurring. I find nothing wrong with flying an extra battery for increased flight time. Who knows if the motors get hot, maybe they don't. So far I haven't seen any posts by someone who has used a rig like this so we have no real data and only conjecture. Is it an April fools trick, I don't think so? April 1st is just another day in many parts of the world. I believe it's just a coincidence.
So instead of being negative, opinionated and harsh, I'd like to see us be open-minded, more supportive and positive. I think the prospect of additional batteries has merit and is worth exploring. If it doesn't turn out to be a good idea after it's been used and vetted, then at least someone tried. It's the "not trying" and dismissal of ideas without even trying that limit what may have potential as we develop and fly these incredible machines.