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Posted

A California teen

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Posted

I thought the problem was the battery itself . Not how your charging it?

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Posted

At the end of the video .... "First she will recharge her own batteries"

Well that was just dirty

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Posted

here I thought it would be 1,000 potatoes wired to a USB charger ;)
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Posted

[quote name='Hum' timestamp='1369147896' post='595702160']
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Posted

Sounds a lot like the work that Professor Kaner and PhD candidate Maher El-Kady of UCLA already done around a month ago.

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Posted

[quote name='AWKM' timestamp='1369149217' post='595702236']


Bet this is the last time we hear from her.
[/quote]
Obviously not, der.

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Posted

[quote name='Hum' timestamp='1369147896' post='595702160']

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Posted

I wish the article explained more into what she invented. Supercaps have been around for a long time, so she must have broken through one of the limitations. Supercaps have a really low energy density, so maybe she figured out a way to improve that.

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Posted

[quote name='AWKM' timestamp='1369149217' post='595702236']
Bet this is the last time we hear from her.
[/quote]

The NSA will give her a ride to the desert ... :ninja:
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Posted

My understanding is that the problem with modern batteries is not that we can't charge them quickly, it's just that the faster we charge them the fewer charge cycles they can sustain before they fail. Capacitors are not a silver bullet either. They charge and discharge rapidly, but they have the same fundamental limitation, hence their ratings. I think this article needs more technical detail; it's much too vague to assess whether what this student did is truly innovative.

[quote]
The higher amps necessary for rapid charge heats up the battery, which shortens battery life. It also causes more gas to form in the liquid (acid) in the battery. This gas is hydrogen, and is highly explosive. Hydrogen gas can build up enough pressure to swell or explode the battery, which is [u]extremely[/u] dangerous.
[/quote]

[b]Source:[/b] [url="http://wiki.answers.com/Q/Slow_charge_vs_fast_charge_for_12_volt_car_batteries"]http://wiki.answers....t_car_batteries[/url]

[b]Addition Reading:[/b]
[url="http://arstechnica.com/science/2012/10/the-fast-and-the-flexible-graphene-foam-batteries-charge-quickly/"]The fast and the flexible: Graphene foam batteries charge quickly[/url]
[url="http://arstechnica.com/science/2011/03/electrode-lets-lithium-batteries-charge-in-two-minutes/"]Electrode lets lithium batteries charge in just two minutes[/url]

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Posted

Somethings are just out there, waiting for the right time to knock on your door.
Just the fact that even the multi-billion companies like Google and Apple missed this technology is surely amazing.
In the end an 18-year-old discovers it.

Life sucks for everyone, except for these lucky people

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Posted

[quote name='xorangekiller' timestamp='1369153591' post='595702406']
My understanding is that the problem with modern batteries is not that we can't charge them quickly, it's just that the faster we charge them the fewer charge cycles they can sustain before they fail. Capacitors are not a silver bullet either. They charge and discharge rapidly, but they have the same fundamental limitation, hence their ratings. I think this article needs more technical detail; it's much too vague to assess whether what this student did is truly innovative.



[b]Source:[/b] [url="http://wiki.answers.com/Q/Slow_charge_vs_fast_charge_for_12_volt_car_batteries"]http://wiki.answers....t_car_batteries[/url]

[b]Addition Reading:[/b]
[url="http://arstechnica.com/science/2012/10/the-fast-and-the-flexible-graphene-foam-batteries-charge-quickly/"]The fast and the flexible: Graphene foam batteries charge quickly[/url]
[url="http://arstechnica.com/science/2011/03/electrode-lets-lithium-batteries-charge-in-two-minutes/"]Electrode lets lithium batteries charge in just two minutes[/url]
[/quote]
Yeah. The article talks more about the potential applications of her invention than the invention itself. Powering a single LED isn't an impressive feat because it uses as little as 30 mW. The most important thing is battery life, not charging speed. I'd rather have a battery that takes 2-3 hours to fully charge and can hold a charge for a long time instead of one that charges in 30 seconds and doesn't last an hour.

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