[Double_Take]

This is exactly why we should be investing in green technology!

Although the nanostructure makes the batteries 20 to 30 percent denser, Braun said the biggest improvement is the rapidity of the charging.

Braun's group worked for about two years on the nanostructure. Since the nanostructure is applied to a battery's cathode, he said, the next step is to study improving the anode, along with further increasing battery density.

Does increasing the density mean a higher charge capacity per pound or does this technology make the battery more heavy for a given charge capacity?

 

[Double_Take]

density = mass/volume

Makes the battery heavier.

I understand that. I have a hard time believing that the charge capacity is identical for a battery of the same size. IE does the heavier more mechanically dense battery provide increased/decreased energy density? The article doesnt mention anything.