Itsy-Bitsy Battery Packs a Wallop
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  • Fat_Man

    “Imagine jump-starting your car with your cell phone,”

    Better yet, don’t. Cell phone batteries can’t be big enough to carry that much current without making the phone too big to be useful as a phone. There really are physical limits on these things.

  • Tim Godfrey

    A Nissan Leaf has a 24KWh battery.

    To charge in 1 hour (assuming no losses) it would require 24,000 watts to be transferred from the grid to the battery. If you had a 240 volt outlet it would have to deliver 100 amps over that hour – an amount that would require a charging cable at least 4 inches in diameter.

    In short, jump starting your car with your cell phone is not going to happen unless someone finds a way to repeal the laws of physics.

  • Andrew Allison

    Tomorrow, tomorrow, tomorrow’s a looong way away. Interesting as this development is, unless/until it actually demonstrates a useful application . . . .? Consider: what percentage of the volume of a cell phone (or any other battery powered device) is represented by the battery?

    Might I respectfully suggest that VM focus on the here-and-now rather than the very fuzzy future. A good start might be to acknowledge that, contrary to the VM position that global warming has slowed, it has in fact reversed course.

  • Jim Luebke

    I could imagine the topography of anode and cathode surfaces in some kind of fractal pattern, increasing the surface area of each, and their proximity to each other. Of course, fabricating that kind of thing could be a bear.

    What kind of thermal / entropic issues are there with these, and how do they get around them?

  • JT

    Aw, this would be lovely. That has always been the problem with energy, it tends to be difficult to store. With all the new electronics requiring batteries, hopfully there will be continued improvement in this area.

    You never know what to make of these things, but recall a few years ago taking with some UofI engineering students that worked with electric cars. They seemed upbeat about what they were seeing with new battery technology being worked on. Possibly this is something they had witnessed being developed.

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