Comments on: Air-Breathing Batteries: How Does Recharging Your Electric Car Only Monthly Sound?

By: Zachary Shahan

Zachary Shahan — Thu, 26 Apr 2012 15:03:00 +0000

lol. literally. thanks for keeping things lighthearted here

By: Ross

Ross — Wed, 25 Apr 2012 17:54:00 +0000

That question isn’t completely silly as it is a “Lithium-Air” battery. Not a closed system!

By: You are an idiot

You are an idiot — Wed, 25 Apr 2012 16:51:00 +0000

……Yeah electricity weighs SOOOO much.

By: Thomas Cheney

Thomas Cheney — Wed, 25 Apr 2012 08:04:00 +0000

How much heavier would the battery be after it is discharged in comparison to a charged state?

By: Captivation

Captivation — Tue, 24 Apr 2012 20:41:00 +0000

Good point. Unfortunately efficiency has never been my strong suit. The only way to be efficient is to plan, and once I start planning nothing ever gets done.

By: Ross

Ross — Tue, 24 Apr 2012 19:57:00 +0000

On the other side of the equation non-biological machines are much less efficient at using energy.

By: Zachary Shahan

Zachary Shahan — Tue, 24 Apr 2012 13:33:00 +0000

lol.

By: Captivation

Captivation — Tue, 24 Apr 2012 13:22:00 +0000

“A 24-kWh lithium-air battery pack could theoretically weigh as little as 4.8 kg, or 10.5 pounds, which is less than some large bags of rice.”

And uncooked rice offers 1600 calories per pound = 1.86 watt/hours/pound. That 10.5 bag of rice only offers about 20 watt hours of power while the same weight lithium air battery offers 24000 watt hours.
Last night I ate Chinese food (vegetarian combo #4) which has even less energy. (Cooked rice = 500-600 calories per pound). I would have been wiser to begin the process of cyborg-ization. Once I convert into a machine a single meal (lithium air combo #4) will keep me running for years.

http://www.unitconversion.org/energy/calories-it-to-watt-hours-conversion.html