Anyone listened to Li-ion batteries? - diyAudio
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Old 14th June 2012, 11:31 AM   #1
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Default Anyone listened to Li-ion batteries?

Hello

I may shortly be using Li-ion batteries for an audio project of mine so would be interested in hearing if any of you had compared the different Li-ion battery types - i.e. what they sound like (not the technical aspects)? And also if you had compared their sound to SLA batteries?

Looking forward to any insights :-)

Jesper
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Old 14th June 2012, 11:36 AM   #2
marce is offline marce  United Kingdom
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How can a battery change sound, its supplying DC.
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Old 14th June 2012, 11:41 AM   #3
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Hi Marce,

Oh - my guess is that they do. Like (most) all other components they are not linear and in my experience that leads them to have sonic "qualities" or characteristics. Also, although they supply DC they are part of an AC circuitry (sound) so will also respond to AC signals.

However, I'm not that interested in starting a thread about "whether or not" they have sonic qualities - more curious as to if someone have listened to them.

Thanks,

Jesper
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Old 14th June 2012, 11:52 AM   #4
AndrewT is offline AndrewT  Scotland
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A battery is a chemical reaction.
The chemical reaction produces an emf.
The chemical reaction is not constant, it varies.
That variation results in noise. Yes it's DC, but it is variable DC.
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Old 14th June 2012, 11:54 AM   #5
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Stop guessing, Marce is correct.
The only time you might have an effect is if your battery is in some way faulty or exhausted. |Then the equivalent series resistance causes the output to fall and if you have no decoupling (an amp fault) then you could have effected performance.
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Henry
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Old 14th June 2012, 11:54 AM   #6
AndrewT is offline AndrewT  Scotland
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I wonder what one could "hear" if a very high gain low noise amplifier were capacitively coupled across a test battery?

There have been some published results of battery noise tests, but I can't remember who, nor when.
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Old 14th June 2012, 11:56 AM   #7
AndrewT is offline AndrewT  Scotland
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Top,
you and Marce are wrong.
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Old 14th June 2012, 11:58 AM   #8
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Hi Andrew, hope you're well.
Interesting idea with the noise, might see if it is measurable.
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Old 14th June 2012, 12:00 PM   #9
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I think Marce and I are right because any noise produced will be microscopic and any amp that is sensitive to that should be scrapped.
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Old 14th June 2012, 12:01 PM   #10
qusp is offline qusp  Australia
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@ Andrew: it was at a regulator test website I think, TNT perhaps? it was based on very old battery technology and was somewhat biased (no pun intended) before lithium and particularly the pretty excellent performing LiFePO4 existed
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