Out of pure curiosity. I have this laptop https://www.amazon.de/...B001P5I0VU which is from about 2009, so 10 years old.
I removed the battery directly from the device the first day and never used it. Probably the battery was charged to 100%. In any case, the battery was unused for 10 years in a box. Now I've used the battery out of curiosity and lo and behold, he still charges and can still operate the device.
It is a Li-Ion battery and should be after 10 years something of deep discharge and thus broken. But he holds enough charge to keep the laptop running for at least an hour.
Originally the battery had 11.1V 4000 mAh.
How is that possible? Why are not the cells dead? Even if the cells were fully charged 10 years ago, the charge will not have "protected" the cells, right?
Does somebody has any idea?
He is still loading
What does the battery charge?
Nobody will tell you why he still works after 10 years. Apparently he does not mind the long storage period.
Apparently he does not mind the long storage period.
Li-ion cells are scrap if you discharge them deeply. The battery block also has a kind of LED display to indicate the charge level at the touch of a button (5 steps, 20% steps). This ad did not work either - not surprising after 10 years. Of course, the display works with charge again.
No one will be able to tell you
There are people who are familiar with accumulators and cell chemistry, so it's not xD
Nevertheless, even the greatest expert can't tell you why exactly this one battery still works.
That's not really surprising. As a rule, lithium ion accumulators can be "revived" by careful / slow charging. The capacity is then significantly lower, but the batteries are still working. Presumably, the charging electronics has no set minimum voltage, otherwise that would not have worked.
-.- °
As long as the battery is not in the laptop, no electricity is drawn. In the computer, the standby circuit monitors whether the computer should be turned on.
This circuit consumes a bit of power; the battery may last for two weeks in standby. As long as the cell voltage is above about 1.5 V, the battery stops. Underneath begins the deadly deep discharge.
The fact that your battery still funzt, is because he was 1. New and 2. No power was pulled, because he was loosely in the box. The self-discharge is extremely low for lithium cells (a few microamps) and so it may be that the battery is still working.
And so it may be that the battery is still working.
I think that I have to read carefully, do you have a source for this?
(some microamps)
Even then, it would be 0 before the end of 10 years.
Or the depth unloading is not too critical, as it is presented. So not so critical that the cells are dead, but only badly damaged.
I do not have a source. This is practical knowledge.
Dumping and damaging does not mean automatically is completely dead.
there are bridges in the electrolyte that can short-circuit the cells and under load the battery will heat up significantly more than normal.
with a "stupid" charger can recharge any deeply discharged battery, but there's the danger that this is relatively spectacular in the air / burns
Li-ion's have a very low self-discharge rate, which should probably have saved the battery cells sometimes before the complete technology death.
The 24 V battery of my old FERM drill driver (Ni - CD) as a purchase approx. Anno 2007 is still charging, but has only a fraction of its rated capacity.
I still have an Acer Travelmate 2410 with Intel Celeron 970M from about 2005 with the first Li-Ion battery from 2005. Battery was always in it, but still loads today and is enough for a few minutes.
With you:
But he holds enough charge to keep the laptop running for at least an hour.
Then the battery was already deeply discharged, but electrochemically at least internally not yet decomposed so far that he should now have at least about 1/4 to 1/5 (or less) of its original nominal capacity.
I once had a Samsung "Daria" with Intel Core 2 Duo T3200 and the battery almost never in it.
After more than 5 years, there was hardly any signs of wear and tear, when I needed the book with a battery and mobilized it before.
At relatively constant temperatures between about 15 to 20 degrees Li-ion can actually be stored quite (amazing) long.
Recharchieren times, which battery runtime Your Book originally. For MPeg 4 - had videos, and compare that with today.
