[Moonman62]

Does it heat up and explode into flames?

[Red Badger]

W#OW!!!!!!!!!!!!!!!

[prophetic]

sweet!!

now a hybrid or fully electric car is almost practical. Instead of an overnight charge you can actually charge up in the time it would take to fill up at a regualr gas station.

[Dionysius]

I’ve heard that the lithium batteries of the coming $40K Chevy Volt have to be replaces at 100,000 miles at the cost of $10K. Credibility?

[Cheetahcat]

I do not care how fast the thing charges it still requires a SOURCE and the speed would be proportional to the SIZE of the charging cord and for a automobile I do not see a woman handling that thing easy.

[Right Wing Assault]

might lead to laptop batteries capable of charging themselves in about a minute

Hmmm. How do they charge themselves? Sounds like free energy.

[Hillarys Gate Cult]

But it’s not a viable product until Billy Mays does an infomercial selling it.

[MeanWestTexan]

They need to patent it elsewhere, sell the rights in some other country, and move to some other country, before Obama taxes them for being “lucky.”

Leave now!

[neverdem]

Half of Black Teens May Be Vitamin D Deficient

New drug shows benefits against nasty asthma It sound's like a monoclonal antibody. It's probably not cheap.

Vitamin C May Help Prevent Gout

FReepmail me if you want on or off my health and science ping list.

[normanpubbie]

This thread is too good to pass up.

I have a Dell laptop which contains a 2300 mA-hr battery (or 2.3 A-hr). 2.3 A-hr is the amount of energy that a fully-charged battery contains and is equal to 8280 A-sec. If I bring the battery from fully-discharged to fully-charged in 9 seconds at a constant charging current, I would need to supply 8280/9 A or 920 amps to the battery for 9 seconds. Furthermore, this 920 amps times 14.8 volts represents 13,616 watts power for the 9-second charge time. Mucho amps and lotsa watts!

How big would the connecting wires need to be to carry this huge current? The largest gauge copper wire in the American Wire Gage standard is number 0000 which is 0.46 inches in diameter and is rated for 380 amps; you would need to connect 3 of these huge wires to each battery terminal to keep from exceeding the wire current-carrying capacity. Of course that much current would vaporize the terminals.

The 920 amps is DC but it could be converted from house current AC by using a power supply. A 120-volt wall circuit can supply 15 amps maximum at 120 volts or 1800 watts. Clearly, if you need 13,616 watts and only 1800 watts is available from your friendly local wall socket, you would come up short. If I got AC from the heftiest circuit in my home breaker box (30 amps at 240 volts), that would provide only one-half of the power needed to charge my laptop battery in the 9 seconds!

Of course, if I ran 920 amps into my laptop battery it would explode. Period.

Someone brought up the Prius. My sister has a Prius and I checked the owner's manual which lists the auto's specifications. According to my calculations, the Prius can run on the battery pack for only two minutes! The gas engine has to almost constantly start, run, and stop to recharge the battery. Her car does get an honest 45 MPG which I attribute to two factors: The engine runs at a constant speed to charge the battery pack (at optimum efficiency) and the Prius wheel motors turn into generators when you slow down, using the car momentum to recharge the battery pack.

[SunkenCiv]

thanks neverdem.

University of Miami physicist develops battery using new source of energy
His discovery is a ‘proof of principle’ of the existence of a ‘spin battery’
University of Miami | Mar 11, 2009 | Unknown
Posted on 03/11/2009 5:30:26 PM PDT by decimon
http://www.freerepublic.com/focus/f-chat/2204683/posts

Breakthrough battery can charge up in seconds
timesonline.co.uk | March 12, 2009 | Mark Henderson
Posted on 03/11/2009 4:41:38 PM PDT by Free ThinkerNY
http://www.freerepublic.com/focus/chat/2204649/posts