Re: [OT]What's the price index of your laptop's battery?
On Sat, Dec 12, 2009 at 02:15:32PM EST, lee wrote:
> On Fri, Dec 11, 2009 at 05:41:05PM -0800, John Jason Jordan wrote:
> > On Sat, 12 Dec 2009 01:42:49 +0100
> > lee <lee@yun.yagibdah.de> dijo:
> >
> > >On Fri, Dec 11, 2009 at 10:45:31PM +0100, Emanoil Kotsev wrote:
> > >>
> > >> no need of lithium at all.
> > >
> > >What's the alternative? Have they found another resource to make
> > >batteries from?
> > There are lots and lots of ways to make batteries. The great
> > advantage of lithium is that it has by far the greatest power to
> > weight ratio of any other material. This is very important for
> > laptops.
> Yeah, but considering how small the amount of energy is that batteries
> can store, even those that use Lithium make for a very poor energy
> storage.
>
> > The disadvantage of lithium is that it is expensive.
>
> Batteries have always been expensive, and they still are. They have
> always been empty, and they always are.
>
> > If you look at the history of batteries you will note that the rate
> > of new battery inventions has been increasing dramatically.
> Then why aren't there dramatically better batteries available yet?
> When I was a child, I had an RC car, and it would run about 1/2 hour
> before the battery was empty. Then it would take so long to recharge
> that you could use it only once a day, maybe twice if you started
> early. Then the batteries of the control device would be empty and
> needed to recharge for a day. I have a Magcharger, and it's useable
> for only about an hour, then takes 10--16 hours to recharge. After not
> even 1/2 year, its battery seems to be on the way out, despite
> treating it well. I've used two different cell phones, and unless you
> actually talk to someone (i. e. use it), the battery lasts only a few
> days. If you use them, the battery is empty after about two hours.
> It's ridiculous. And are there any batteries yet that are up to the
> temperature specifications for mobile devices? Even the ones you get
> for Magchargers aren't. I have a GPS device, and its battery is almost
> always empty --- even if it's not, it lasts maybe 20--30 minutes at
> best.
>
> Batteries just suck, and I don't see that changing any time soon, if
> ever.
All your questions and more are answered in the excellent link provided
by Chris Bannister.
Here's a reminder in case you have deleted his post:
http://www.batteryuniversity.com
CJ
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