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Old 08-02-2011, 05:04 PM   #16
chas0039
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1) Sinxce I only charge my eReader every week or so, that means the life of the battery will be around 1000 weeks or almost 20 years.
Sorry, not true. The math works but these batteries start to die from the date of manufacturer. Under the best of circumstances, they last 3-4 years.
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Old 08-02-2011, 08:34 PM   #17
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Quite true, I'm afraid. Modern lithium batteries begin to deteriorate the moment the leave the factory. You can minimise the rate of decay via partial charging and temperature control, but it can't be eliminated.

This is why modern devices arrive partially charged.
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Old 08-03-2011, 07:44 AM   #18
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Quite true, I'm afraid. Modern lithium batteries begin to deteriorate the moment the leave the factory. You can minimize the rate of decay via partial charging and temperature control, but it can't be eliminated.

This is why modern devices arrive partially charged.
You didn't understand what I said. It is untrue that he will get 20 years of life just based on the number of charges.
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Old 08-03-2011, 08:15 AM   #19
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You didn't understand what I said.
...and what gave you that idea, chas?

I was attempting to agree with your statement, but if you wish to argue the point so be it.

I'm seeing a disheartening trend towards combative attitudes and behaviour among many people on this forum... is it just me?
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Old 08-03-2011, 11:22 AM   #20
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Quite true, I'm afraid. Modern lithium batteries begin to deteriorate the moment the leave the factory. You can minimise the rate of decay via partial charging and temperature control, but it can't be eliminated.

This is why modern devices arrive partially charged.
No, the reason they come partially charged is that they degrade it left fully charged for long periods of time.

And they are destroyed by being discharged too far. Since they have a small, but definite, self discharge rate, they are normally stored at 1/2 charge. This limits the damage from fully charged and limits the possibility of self-discharge takingthem too low.

And Ihave lipo packs used in RC flying that are well over 3 years old that perform fine. And they go through much more heavy use (high discharge, high temps, fully charged to almost fully discharged).
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Old 08-03-2011, 11:23 AM   #21
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I agree that 20 years is unlikely, but 5+ years is fully within the capability.
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Old 08-03-2011, 11:14 PM   #22
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I sympathize with the desire for AA batteries. I myself prefer them vastly on game controllers - gimme 2 AA eneloop batteries any day over a charging pack setup.

But on an e-ink reader...the Nook touch really does get almost a month of life, even with heavy, heavy reading, at least with wireless off. The Kindle does well also.

One of the few cases I'll not choose AAs.
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Old 08-04-2011, 08:05 AM   #23
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Quote:
Originally Posted by TedJ View Post
...and what gave you that idea, chas?

I was attempting to agree with your statement, but if you wish to argue the point so be it.

I'm seeing a disheartening trend towards combative attitudes and behaviour among many people on this forum... is it just me?

My comment was hardly combative, but I see what you were saying. You were saying my statement was true not the other poster's.

My mistake, part of the problem these days when no one is face to face.

Sorry.
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Old 08-04-2011, 03:55 PM   #24
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I agree that 20 years is unlikely, but 5+ years is fully within the capability.
I would agree.

I have a laptop that I purchased in 1999. It had a new battery in November 2004 and it still going!
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