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 Post subject: Battery
 Post Posted: Sat Feb 27, 2010 9:38 pm 
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Joined: Wed Dec 30, 2009 11:52 am
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Why can a car battery last 10 years and a laptop battery only 1-2 years?


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 Post subject: Re: Battery
 Post Posted: Sat Feb 27, 2010 9:43 pm 
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Car batteries normally last about 5 years, and they would last only a week or so if fully discharged and recharged ala laptop batteries. Apples and oranges I'm afraid. Scott.


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 Post subject: Re: Battery
 Post Posted: Sat Feb 27, 2010 9:50 pm 
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Location: Stowmarket, Suffolk England
John wrote:
Why can a car battery last 10 years and a laptop battery only 1-2 years?


Also don't forget they use different Chemistry and also think about the size...


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 Post subject: Re: Battery
 Post Posted: Sun Feb 28, 2010 2:40 pm 
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Thanks

Maybe battery technology will be the next thing to really advance.


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 Post subject: Re: Battery
 Post Posted: Sun Feb 28, 2010 3:02 pm 
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It already has. In fact an enhanced version of laptop battery technology (i.e. lithium ion) is what will be used in the upcoming plug-in hybrids like the Chevy Volt. Scott.


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 Post subject: Re: Battery
 Post Posted: Sun Feb 28, 2010 7:26 pm 
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Or already in use in an all electric.


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 Post subject: Re: Battery
 Post Posted: Sun Feb 28, 2010 7:47 pm 
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True, but I only wanted to mention something actually practical and useful. <g> Scott.


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 Post subject: Re: Battery
 Post Posted: Mon Mar 01, 2010 11:00 am 
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Joined: Wed Mar 18, 2009 12:48 pm
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Location: USA
So when are you and Mike trading in those Impalas you mentioned recently for your new Volts? <g>

Evan


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 Post subject: Re: Battery
 Post Posted: Mon Mar 01, 2010 11:20 am 
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Those cars are long gone for the both of us. As for me, I'd be happy to drive a new Volt if somebody buys me one. <g> Scott.


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 Post subject: Re: Battery
 Post Posted: Tue Mar 02, 2010 8:30 pm 
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Don't you have enough Laptop batteries knocking around to build your own? :)


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 Post subject: Re: Battery
 Post Posted: Sun Mar 07, 2010 7:23 pm 
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Forget the Volt. Check out the Tesla.

As for the battery life, you could attach a small alternator to the processor heat sink fan...... :idea:


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 Post subject: Re: Battery
 Post Posted: Sun Mar 07, 2010 10:07 pm 
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The Tesla Roadster is a boutique vehicle, essentially a rich person's environmental "statement" (for which they must pay dearly), and not a serious production car. The Roadster is basically a Lotus Elise, with the chassis and body built by Lotus and then shipped here for installation of the electrics. In fact because Lotus is changing the Elise to an entirely new platform in 2012, Tesla will be forced to end production of the current Roadster in 2011 and replace it with a new model which will not be introduced until 2013 at the earliest.

In the mean time all they will have to offer is the forthcoming Model S sedan, which I believe is a mistake and will undoubtedly be the demise of the company, as I don't think there is any way they can compete with the engineering and production capabilities of the major automakers for a truly practical mainstream automobile. For example, the Volt will sell for less than half the price of the Tesla Model S sedan (assuming Tesla survives long enough to produce it), and because the Volt is a plug-in hybrid, it will have at least triple the practical range.

Bottom line: When plug-in hybrids like the Volt (and others like it) arrive, I'm afraid it will be "game over" for boutique electrics like the Tesla, unless they stick to their niche market. Scott.


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 Post subject: Re: Battery
 Post Posted: Mon Mar 08, 2010 8:12 am 
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Scott wrote:
The Tesla Roadster is a boutique vehicle, essentially a rich person's environmental "statement"


Hi Scott, this made me think of an article i once read. Do you think there is much truth in this article?

http://www.casa.ucl.ac.uk/cyberspace/Po ... -waste.pdf


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 Post subject: Re: Battery
 Post Posted: Mon Mar 08, 2010 9:44 am 
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Yes indeed. Scott.


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 Post subject: Re: Battery
 Post Posted: Thu Mar 11, 2010 2:19 pm 
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Would it be at all likely that Lenovo would update their battery tech, from say Li-ion to Li-ion polymer, for existing battery packages? I've noticed their batteries at least sometimes span at least several TP generations.


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 Post subject: Re: Battery
 Post Posted: Thu Mar 11, 2010 4:14 pm 
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Li-ion batteries are ideally suited to larger sized applications where the use of standard cells internally greatly reduces the overall cost. For example, I just bought a 9 Cell (10.8V 7.8 Ah) Li-ion battery for $100 (including shipping, which is significantly less than even NewEgg), which internally uses nine #18650 cells rated at 3.7V and 2600 mAh. A big battery like that would have easily cost 3 times or more that amount if it were Li-Po. The market (myself included) is simply not going to pay $300+ for a laptop battery, even if it would offer some additional capacity.

On the other hand, for smaller batteries, especially those where the physical shape dictates that they cannot internally use the industry standard round cells (like bay batteries for example), Li-Po batteries are indeed used by Lenovo for some systems.

Bottom line: Like most laptop manufacturers, Lenovo uses the battery best suited for the specific ThinkPad system or application. Scott.


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