On Saturday, 23 May 2015 20:36:04 UTC+2, Lord Vath wrote:

I've seen airplanes at air shows fly upside down.

"Upside down" is always relative to the observer's orientation.
Your upside down could easily be my right way up, cobber.

Good news on the batteries front, though.
Science spurred on by intense competition at a time of desperate need.
The rewards could be absolutely immense.
Not least the gratitude of mankind as the inventor's name is immortalised.
Start selling your stocks in centralised energy now.
Before it's too late and governments start wasting more taxpayer's money in propping them up!
Energy poverty could soon be a distant memory right around the world.
Where do I queue for my taxpayer subsidised electric car and solar roof panels?
I want to become yet another cell amongst the billions in global society's energy storage battery.
The medium of choice for CO2-responsible governments as Antarctica slips en-masse into stormy seas.
Let's make drilling for oil and coal as outdated and filthy as steam locos.