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USC Researchers Invent Longer-Lasting Lithium-Ion Battery

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Ann R. Thryft
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Re: Longer Lasting?
Ann R. Thryft   2/26/2013 12:20:18 PM
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I think we could use a few different versions of "talk time" for other, non-cell phone apps, to indicate length of charge. Anybody know any?

Jack Rupert, PE
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Re: Longer Lasting?
Jack Rupert, PE   2/26/2013 4:37:49 PM
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Ann, I didn't know about the "talk-time" term either.  Is there a standard for calculating it?  I pay more attention to monitoring the battery hours on my laptop, so I know that there are a whole bunch of things that can affect that (brightness, software being run, communication devices, etc.).  I would think that there would need to be a certain standard combination of those types of inputs for comparison across products.

Ann R. Thryft
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Re: Longer Lasting?
Ann R. Thryft   2/26/2013 5:31:36 PM
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Jack, that's not a spec or a standard, just a handle that immediately gives a picture of how long a battery charge lasts in a cell phone app, based on what the app is used for, in this case, talking. I suppose you could say "video watching time" if you had a battery-powered video player. I don't even know if the term is still in use. Back in the day I used to do the same kind of monitoring you describe on my Mac laptop, although it now comes with preset options for Battery vs AC Power, and switches automatically depending on whether it's plugged in.

Charles Murray
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Re: Longer Lasting?
Charles Murray   2/26/2013 7:47:48 PM
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"Talk time" is application dependent, so the same battery might have a different talk time from one application to the next. So I would imagine the best way to express it would be in the battery manufacturer's parlance -- Amp-hours -- wouldn't it?

Pubudu
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Re: Innovation is happening
Pubudu   2/27/2013 12:17:57 AM
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Elizabeth, thanks for the awareness article

Do you have any idea of cost of production and the weight of these batteries compared to the other batteries.

Elizabeth M
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Re: Longer Lasting?
Elizabeth M   2/27/2013 4:20:51 AM
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Jack, I didn't think of that, but it would be a good idea to have a standard for comparison. Funny, but as important as the battery is, it seems we sometimes often forget about it when buying a gadget if we are determined to have the latest and most innovatively designed device. Or maybe that's just me!

Elizabeth M
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Re: Innovation is happening
Elizabeth M   2/27/2013 5:11:00 AM
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Hi, Pubudu, sorry I don't know offhand that information but I will take a look at the info about the research online and see if I can find out. Here is a link to a press release about the research: http://news.usc.edu/#!/article/46778/cheap-strong-lithium-ion-battery-developed-at-usc/

Ann R. Thryft
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Re: Longer Lasting?
Ann R. Thryft   2/27/2013 11:44:06 AM
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Chuck is right, "talk time" varies from one battery brand and model to the next. Length of charge or how long charge is retained is probably the appropriate term & spec for comparison purposes. Although actual talk time, i.e., actual usage time, is shorter than how long a battery retains its charge. That's why the term "talk time" was invented: how long can you continue to use the product?

Jack Rupert, PE
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Re: Longer Lasting?
Jack Rupert, PE   2/28/2013 2:01:55 PM
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Come to think of it, Chuck, I guess amp-hours is a useful metric for general comparison purposes.  I do look at that number when I'm purchasing rechargeable AA cells.  Sure, manufacturer X is optimized for application Y, but it is a good starting point that is probably at least as accurate as talk hours.

Charles Murray
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Re: Longer Lasting?
Charles Murray   2/28/2013 6:29:05 PM
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Ann, I guess it depends on whose perspective we view it from -- the phone manufacturer or the battery maker.  

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