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Stored Lithium-ion batteries self exterminate after 2-3 years?

  1. Sep 23, 2018 #1
    https://electronics.howstuffworks.com/everyday-tech/lithium-ion-battery2.htm

    "Lithium-ion batteries age. They only last two to three years, even if they are sitting on a shelf unused. So do not "avoid using" the battery with the thought that the battery pack will last five years."


    Is this claim substantied by facts? My mother has a lion-battery smartphone from 2013 still in use. Can someone explain how it's still working if the battery will self exterminate within 2-3 years regardless of use?
     
  2. jcsd
  3. Sep 23, 2018 #2

    Drakkith

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    The 2-3 years is how long it takes for the batteries to degrade enough that they are very noticeably 'used'. They don't last nearly as long as they did when they were new and the maximum voltage is substantially reduced. It's not a sudden works vs doesn't work scenario.
     
  4. Sep 23, 2018 #3

    anorlunda

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    I did a little Internet research on your question. Here are four things that may be relevant.
    1. Shelf life and cycle life are different things. Your mother's phone was presumably used during those years.
    2. Not all lithium batteries are alike. Chemistry and structural differences affect shelf life and cycle life. Some lithium batteries (such as in medical implants) are designed to last 20 years.
    3. Storage while discharged is bad. They should have 40-100% charge while stored. One site recommends recharging them once a year even if not used.
    4. Storage temperature and humidity are factors.
     
  5. Sep 23, 2018 #4
    How do you account for the fact that my newly purchased Sony phone that had been on the stores shelf for 1+ year (default battery level had dropped to 10% by storage alone) still has a fresh battery performance?

    And if I'm reading this data properly, a Lithium ion only loses a few percentages stored in favourable temperatures after 1 year.



    Table 3: Estimated recoverable capacity when storing Li-ion for one year at various temperatures. Elevated temperature hastens permanent capacity loss. Not all Li-ion systems behave the same.

    0°C 98% (after 1 year)
    25°C 96% (after 1 year)
    40°C 85% (after 1 year)
    60°C 75% (after 1 year)
    (after 3 months)

    https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
     
  6. Sep 23, 2018 #5
    The citation I gave claimed that it doesn't matter if you cut down on the usage. It doesn't matter what you do, - it cannot live past 2-3 years anyway, or else their meanin of the word "last" differ from mine.
     
  7. Sep 23, 2018 #6

    Drakkith

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    I would not interpret their claim as being an 'all or nothing' type of claim. That is, their meaning of the word 'last' is different from yours.
     
  8. Sep 23, 2018 #7
    "do not "avoid using" the battery with the thought that the battery pack will last five years."

    That is explicitly stating that the battery will NOT last 5 years.
     
  9. Sep 23, 2018 #8

    Drakkith

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    Yes, because the batteries will not work as well as they would have when you bought them. That doesn't mean that they flat out will not work at all, just that they will work at a much reduced capacity.
     
  10. Sep 23, 2018 #9
    Be that as it may, you did not account for how my 1 year old, stored Sony Xperia copy has the exact same battery performance as the one I bought a year before (I broke the previous one and bought a new one a few days ago). It's the same model - XZ Premium
     
  11. Sep 23, 2018 #10

    Drakkith

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    Why would there be a significant difference?
     
  12. Sep 23, 2018 #11
    I clocked the performance of the XZ Premium purchased a year ago, when it was new, and now this stored, unused one - Same performance.
     
  13. Sep 23, 2018 #12
    Because Lion Batteries degrade stored (kinda the point of the citation I gave). I had lost the default charge mode all the way down to 10% opening a brand new phone. The default charge mode for "fresh" phones in a store is around 44-55%
     
  14. Sep 23, 2018 #13

    Drakkith

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    Yes, but as you yourself showed in post #4, the degradation can be quite small. When stored at room temperature you still have about 95% of the maximum performance after 1 year. After 3 years this falls to about 85% (assuming a linear relationship), potentially less if the temperature is higher, such as if they've been stored in a non-climate-controlled facility. A 5% drop isn't noticeable, but a 15% drop can be and a 25-30% drop is definitely noticeable.
     
  15. Sep 23, 2018 #14
    So what to do in a year if I want to replace the battery? The batteries for the model would have been 2 years in storage by then. Can I put in a generic Lithium-ion battery of the same volt but say smaller size, without jeopardizing the phones internal components?
     
  16. Sep 23, 2018 #15

    Drakkith

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    Yes, as long as the voltage is identical then you should be okay.
     
  17. Sep 23, 2018 #16
    So you don't need an indentical physical fit to actually mount the lion battery in place into the phone?
     
  18. Sep 23, 2018 #17

    Drakkith

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    If you can fit it inside and somehow make the connections, it doesn't matter what its shape and size are. They don't affect the electrical performance.
     
  19. Sep 23, 2018 #18

    Merlin3189

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    I would hope not. Manufacturers should be producing batteries just in time for needs and storing them in optimal conditions for the minimum time necessary. Maybe the availability of cheap batteries on <internet sources> represents the disposal of any overstock?
    If your phone is obsolete and the batteries are no longer produced, then presumably you really are buying old batteries. Perhaps somebody is preserving some stock in good conditions?

    Aside from those comments, I wonder how you know your replacement battery is as good as the original? Battery testing is not simple. (Read more on Battery University.)
     
  20. Sep 23, 2018 #19
    "So you don't need an identical physical fit to actually mount the lion battery in place into the phone?"

    IMHO, you'll need a closely physically and electrically compatible battery, from a reputable supplier, especially if there is 'smart' charging etc.

    Think chip-coded ink-jet cartridges on steroids, with possible leakage of fire and smoke etc rather than just ink...
     
  21. Sep 23, 2018 #20
    A brand new generic replacement battery is surely better than a 2-year one model specific. It only costs a few hundred dollars to buy a new battery and pay a work-shop, as opposed to hundreds of dollars for a new high end phone. The LCD display on it will not break down anytime soon, unlike the OLED technology which is still in its infancy.
     
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