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USC Researchers Invent Longer-Lasting Lithium-Ion Battery

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Charles Murray
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Re: Longer Lasting?
Charles Murray   3/4/2013 8:06:42 PM
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It's going to be hard to squeeze more energy out of lithium-ion, what with researchers already approaching 40% of the theoretical limit. But faster recharge time could be an important step forward.

Ann R. Thryft
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Re: Longer Lasting?
Ann R. Thryft   3/1/2013 12:42:30 PM
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The perspective of "talk time" is the user's, which is why the term was invented. Although it's therefore a "marketing" term, it gave a much clearer picture of what the challenge actually was, i.e., improve and extend the system function and therefore the user experience, something that can get lost when looking only at specs. As mentioned, that was back in the day: cell phones were used for talking only, and batteries didn't last very long, certainly not as long as users expected. These days we should also be saying "text time" as Al points out.

apresher
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Battery technology
apresher   3/1/2013 11:11:44 AM
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Recharging in 10 minutes is a very valuable feature. With smartphones, talk time seems to be meaningless in terms of how the battery is doing.  The data connection is the big user of power at least for me.  Maybe I'm not talking as much as others versus texting, surfing. Amp-hours is probably more accurate but definitely a tech spec in comparing models.

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.  

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.

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?

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/

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!

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.

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?

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