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correction to "All about batteries" page
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correction to "All about batteries" page

by luky83 on Mon Nov 22, 2010 6:32 pm

In the page under " Library > batteries " in the very first paragraph How batteries are measured i subsequently read:
1 Weight and power density: more expensive batteries will have a higher power density.
2 Price: Price is pretty much inversely proportional to power-density and proportional to power capacity.

Am I wrong , or the first sentence is saying that price is directly proportional to power density ? (as it intuitively do)
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Re: correction to "All about batteries" page

by tinsmith on Mon Nov 22, 2010 9:29 pm

You're right, and the first point is (generally) the correct one. Batteries tend to increase in cost as energy density increases. Technology which increases energy density also leads to the ability to put the same amount of energy into a smaller package (density being the amount of X that you get per how much size).

Older technology tends to cluster more, e.g. the price differentiation between different common alkaline batteries isn't that large compared to a "cutting edge" chemistry. There's also nothing to prevent inversions or whatever, particularly name brand vs. generic. But in general, that's the trend, because it's easy to make a large low-storage battery and harder to make a small high-storage battery.
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Re: correction to "All about batteries" page

by luky83 on Tue Nov 23, 2010 8:15 am

tinsmith wrote:You're right, and the first point is (generally) the correct one

My post was meant to put on evidence that the second sentence say the opposite of the first.
Wouldn't you say that the second sentence is completely false?

Anyway I would suggest to rewrite this part of the article in a less confusing way
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Please be positive and constructive with your questions and comments.