3 ms·

1kWh as aluminium is about 66g (assuming 15kWh per kilo manufacturing input) or about 4 drink cans.

• bigiain 10y ago
  25 million kWh as mass is about 1g (E=mc^2) so 1kWh is 40 nanograms or about 1/150th of a grain of sugar. (handwaving away a method for 100% efficient conversion of mass to energy... But solving that would be a _really_ good thing...)
  • adrianN 10y ago
    Just drop it in a black hole and collect the Hawking radiation.
    • wruza 10y ago
      I wonder how much energy it will take to push matter into already steaming blackhole.
• mrfusion 10y ago
  Wow so I could gather up a bunch of cans and heat my house.
  • deleted 10y ago
    [deleted]
  • jrockway 10y ago
    The key to batteries is being able to use the stored energy. Bonus points if you can add energy and get it back later.
    • xyzzy123 10y ago
      Thermite :p
      • marak830 10y ago
        I know it's frowned upon saying this, but damn if I didn't choke on my coffee haha. Yeah let's not use thermite to heat our houses people.
    • Tuna-Fish 10y ago
      Metal-air batteries are a thing.