Hi there, thank you for sharing this test flight footage with the informations included with our fellow Forum users. Your contribution is highly appreciate and keep us posted always!
A 2500mAh battery has been available on several Aliexpress shops for a week or so. Looks very hacky and kinda expensive (110-140€). But if anyone wants to try, it's there.
Hot damn! Someone took my wishes and did it. I do hope that DJI does what they do for some of their drones and offers a "plus" battery to give this little gem some more single trip flight time.