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  1. #1
    trent
    Guest
    Hi,
    I got a cellphone li-ion battery for my cellphone. How sholud i
    charge/discharge my li-ion battery to prolong and maximise li-ion
    battery's lifespan? I got a new Samsung cellphone, the battery was
    inserted by the sales assisstant. But when i got back, the battery is
    shown to be full on the battery indicator! How long should i charge
    for the first time? How many times should i charge initially before
    using cellphone? Should i use the cellphone until 1 bar on the
    indicator before recharging, and how much should i charge the
    cellphone , as shown by the indicator,full or partial?? There seems to
    be different theories in this topic.Please help clear my confusion!
    Thanks a million for your kind advise and replies.Thanks!



    See More: How should i charge my li-ion battery of my cellphone?




  2. #2
    Mel Harris
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    The first time it should be charged for at least 12 hours before using. The
    next 2 or 3 times you should run the battery down as low as you can and then
    charge. After that, charge it when ever. I usually plug the car charger in
    when I'm driving to keep a full charge.
    Mel

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    "trent" <[email protected]> wrote in message
    news:[email protected]
    > Hi,
    > I got a cellphone li-ion battery for my cellphone. How sholud i
    > charge/discharge my li-ion battery to prolong and maximise li-ion
    > battery's lifespan? I got a new Samsung cellphone, the battery was
    > inserted by the sales assisstant. But when i got back, the battery is
    > shown to be full on the battery indicator! How long should i charge
    > for the first time? How many times should i charge initially before
    > using cellphone? Should i use the cellphone until 1 bar on the
    > indicator before recharging, and how much should i charge the
    > cellphone , as shown by the indicator,full or partial?? There seems to
    > be different theories in this topic.Please help clear my confusion!
    > Thanks a million for your kind advise and replies.Thanks!






  3. #3
    tuned by RZO
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    "Mel Harris" <[email protected]> wrote in message
    news:[email protected]
    | The first time it should be charged for at least 12 hours before using.
    The
    | next 2 or 3 times you should run the battery down as low as you can and
    then
    | charge. After that, charge it when ever. I usually plug the car charger in
    | when I'm driving to keep a full charge.
    | Mel
    |

    As low as u can generally means until it switches off by itself. If you are
    unable to do so, then when it bleeps the battery low warning, charge it full
    for 12-16 hours. For bigger capacity batteries (9210 3310 and 5110 series
    batteries add a few more hours - 16 would be great)

    | --
    |
    |
    | -------------------------------------------------------------------------
    | FIGHT BACK AGAINST SPAM!
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    |
    |
    | "trent" <[email protected]> wrote in message
    | news:[email protected]
    | > Hi,
    | > I got a cellphone li-ion battery for my cellphone. How sholud i
    | > charge/discharge my li-ion battery to prolong and maximise li-ion
    | > battery's lifespan? I got a new Samsung cellphone, the battery was
    | > inserted by the sales assisstant. But when i got back, the battery is
    | > shown to be full on the battery indicator! How long should i charge
    | > for the first time? How many times should i charge initially before
    | > using cellphone? Should i use the cellphone until 1 bar on the
    | > indicator before recharging, and how much should i charge the
    | > cellphone , as shown by the indicator,full or partial?? There seems to
    | > be different theories in this topic.Please help clear my confusion!
    | > Thanks a million for your kind advise and replies.Thanks!
    |
    |





  4. #4
    Charles Hawtrey
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    [email protected] (trent) staggered to the nearest keyboard and
    wrote:

    >Hi,
    > I got a cellphone li-ion battery for my cellphone. How sholud i
    >charge/discharge my li-ion battery to prolong and maximise li-ion
    >battery's lifespan?


    The usual advice is to discharge the battery fully before recharging
    it. As is often the case with common-sense wisdom, this is wrong.

    According to Motorola, "The relationship between DOD (depth of
    discharge) and cycle life is logarithmic. In other words, the number
    of cycles yielded by a battery goes up exponentially the lower the
    DOD. Research studies have shown that the typical cellular phone user
    depletes their battery about 25 to 30 percent before recharging.
    Testing has shown that at this low level of DOD a lithium-ion battery
    can expect between 5 and 6 times the cycle numbers of a battery
    discharged to the one hundred percent DOD level continuously."

    Extensive discussion appears at:
    http://www.motorola.com/ies/ESG/testlab/article1.htm


    --
    hambu n hambu hodo



  5. #5
    CharlesH
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    In article <[email protected]>,
    Charles Hawtrey <[email protected]> wrote:
    >[email protected] (trent) staggered to the nearest keyboard and
    >wrote:
    >
    >>Hi,
    >> I got a cellphone li-ion battery for my cellphone. How sholud i
    >>charge/discharge my li-ion battery to prolong and maximise li-ion
    >>battery's lifespan?

    >
    >The usual advice is to discharge the battery fully before recharging
    >it. As is often the case with common-sense wisdom, this is wrong.
    >
    >According to Motorola, "The relationship between DOD (depth of
    >discharge) and cycle life is logarithmic. In other words, the number
    >of cycles yielded by a battery goes up exponentially the lower the
    >DOD. Research studies have shown that the typical cellular phone user
    >depletes their battery about 25 to 30 percent before recharging.
    >Testing has shown that at this low level of DOD a lithium-ion battery
    >can expect between 5 and 6 times the cycle numbers of a battery
    >discharged to the one hundred percent DOD level continuously."
    >
    >Extensive discussion appears at:
    >http://www.motorola.com/ies/ESG/testlab/article1.htm


    The old full-discharge-before-recharging advice is applicable to NiCd
    batteries, but, as indicated above, most emphatically does NOT apply
    to LiIon batteries.




  6. #6
    tuned by RZO
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    "CharlesH" <[email protected]> wrote in message
    news:[email protected]
    | In article <[email protected]>,
    | Charles Hawtrey <[email protected]> wrote:
    | >[email protected] (trent) staggered to the nearest keyboard and
    | >wrote:
    | >
    | >>Hi,
    | >> I got a cellphone li-ion battery for my cellphone. How sholud i
    | >>charge/discharge my li-ion battery to prolong and maximise li-ion
    | >>battery's lifespan?
    | >
    | >The usual advice is to discharge the battery fully before recharging
    | >it. As is often the case with common-sense wisdom, this is wrong.
    | >
    | >According to Motorola, "The relationship between DOD (depth of
    | >discharge) and cycle life is logarithmic. In other words, the number
    | >of cycles yielded by a battery goes up exponentially the lower the
    | >DOD. Research studies have shown that the typical cellular phone user
    | >depletes their battery about 25 to 30 percent before recharging.
    | >Testing has shown that at this low level of DOD a lithium-ion battery
    | >can expect between 5 and 6 times the cycle numbers of a battery
    | >discharged to the one hundred percent DOD level continuously."
    | >
    | >Extensive discussion appears at:
    | >http://www.motorola.com/ies/ESG/testlab/article1.htm
    |
    | The old full-discharge-before-recharging advice is applicable to NiCd
    | batteries, but, as indicated above, most emphatically does NOT apply
    | to LiIon batteries.
    |

    Yes, but with a nimh battery do discharge it fully else it'll be sorta
    useless in 2 years light use on a 3310. the compatible li-ion works much
    better.





  7. #7
    tuned by RZO
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    "CharlesH" <[email protected]> wrote in message
    news:[email protected]
    | In article <[email protected]>,
    | Charles Hawtrey <[email protected]> wrote:
    | >[email protected] (trent) staggered to the nearest keyboard and
    | >wrote:
    | >
    | >>Hi,
    | >> I got a cellphone li-ion battery for my cellphone. How sholud i
    | >>charge/discharge my li-ion battery to prolong and maximise li-ion
    | >>battery's lifespan?
    | >
    | >The usual advice is to discharge the battery fully before recharging
    | >it. As is often the case with common-sense wisdom, this is wrong.
    | >
    | >According to Motorola, "The relationship between DOD (depth of
    | >discharge) and cycle life is logarithmic. In other words, the number
    | >of cycles yielded by a battery goes up exponentially the lower the
    | >DOD. Research studies have shown that the typical cellular phone user
    | >depletes their battery about 25 to 30 percent before recharging.
    | >Testing has shown that at this low level of DOD a lithium-ion battery
    | >can expect between 5 and 6 times the cycle numbers of a battery
    | >discharged to the one hundred percent DOD level continuously."
    | >
    | >Extensive discussion appears at:
    | >http://www.motorola.com/ies/ESG/testlab/article1.htm
    |
    | The old full-discharge-before-recharging advice is applicable to NiCd
    | batteries, but, as indicated above, most emphatically does NOT apply
    | to LiIon batteries.
    |

    Yes, but with a nimh battery do discharge it fully else it'll be sorta
    useless in 2 years light use on a 3310. the compatible li-ion works much
    better.





  8. #8
    tuned by RZO
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    "Charles Hawtrey" <[email protected]> wrote in message
    news:[email protected]
    | [email protected] (trent) staggered to the nearest keyboard and
    | wrote:
    |
    | >Hi,
    | > I got a cellphone li-ion battery for my cellphone. How sholud i
    | >charge/discharge my li-ion battery to prolong and maximise li-ion
    | >battery's lifespan?
    |
    | The usual advice is to discharge the battery fully before recharging
    | it. As is often the case with common-sense wisdom, this is wrong.
    |
    | According to Motorola, "The relationship between DOD (depth of
    | discharge) and cycle life is logarithmic. In other words, the number
    | of cycles yielded by a battery goes up exponentially the lower the
    | DOD. Research studies have shown that the typical cellular phone user
    | depletes their battery about 25 to 30 percent before recharging.
    | Testing has shown that at this low level of DOD a lithium-ion battery
    | can expect between 5 and 6 times the cycle numbers of a battery
    | discharged to the one hundred percent DOD level continuously."
    |

    Of course. The lower DOD means shorter usage between charges = more short
    charges possible. But does it mean longer useful lifespan of the same
    battery?

    | Extensive discussion appears at:
    | http://www.motorola.com/ies/ESG/testlab/article1.htm
    |
    |
    | --
    | hambu n hambu hodo





  9. #9
    tuned by RZO
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    "Charles Hawtrey" <[email protected]> wrote in message
    news:[email protected]
    | [email protected] (trent) staggered to the nearest keyboard and
    | wrote:
    |
    | >Hi,
    | > I got a cellphone li-ion battery for my cellphone. How sholud i
    | >charge/discharge my li-ion battery to prolong and maximise li-ion
    | >battery's lifespan?
    |
    | The usual advice is to discharge the battery fully before recharging
    | it. As is often the case with common-sense wisdom, this is wrong.
    |
    | According to Motorola, "The relationship between DOD (depth of
    | discharge) and cycle life is logarithmic. In other words, the number
    | of cycles yielded by a battery goes up exponentially the lower the
    | DOD. Research studies have shown that the typical cellular phone user
    | depletes their battery about 25 to 30 percent before recharging.
    | Testing has shown that at this low level of DOD a lithium-ion battery
    | can expect between 5 and 6 times the cycle numbers of a battery
    | discharged to the one hundred percent DOD level continuously."
    |

    Of course. The lower DOD means shorter usage between charges = more short
    charges possible. But does it mean longer useful lifespan of the same
    battery?

    | Extensive discussion appears at:
    | http://www.motorola.com/ies/ESG/testlab/article1.htm
    |
    |
    | --
    | hambu n hambu hodo





  10. #10
    gopi
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    [email protected] (Charles Hawtrey) wrote in message news:<[email protected]>...
    > According to Motorola, "The relationship between DOD (depth of
    > discharge) and cycle life is logarithmic. In other words, the number
    > of cycles yielded by a battery goes up exponentially the lower the
    > DOD. Research studies have shown that the typical cellular phone user
    > depletes their battery about 25 to 30 percent before recharging.
    > Testing has shown that at this low level of DOD a lithium-ion battery
    > can expect between 5 and 6 times the cycle numbers of a battery
    > discharged to the one hundred percent DOD level continuously."
    >
    > Extensive discussion appears at:
    > http://www.motorola.com/ies/ESG/testlab/article1.htm


    Very interesting article. I think the article is a bit unclear at
    first, however. If the battery is linear, then you'd expect that by
    discharging it 25% each time you'd get 4x as many charge/discharge
    cycles as if you did 100%. This makes the 5x or 6x sound a bit less
    astounding.

    In other words, you get 25% to 50% more life out of your battery if
    you only discharge it a quarter each time. That's quite good, but not
    as impressive as the article sounds at first.



  11. #11
    gopi
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    [email protected] (Charles Hawtrey) wrote in message news:<[email protected]>...
    > According to Motorola, "The relationship between DOD (depth of
    > discharge) and cycle life is logarithmic. In other words, the number
    > of cycles yielded by a battery goes up exponentially the lower the
    > DOD. Research studies have shown that the typical cellular phone user
    > depletes their battery about 25 to 30 percent before recharging.
    > Testing has shown that at this low level of DOD a lithium-ion battery
    > can expect between 5 and 6 times the cycle numbers of a battery
    > discharged to the one hundred percent DOD level continuously."
    >
    > Extensive discussion appears at:
    > http://www.motorola.com/ies/ESG/testlab/article1.htm


    Very interesting article. I think the article is a bit unclear at
    first, however. If the battery is linear, then you'd expect that by
    discharging it 25% each time you'd get 4x as many charge/discharge
    cycles as if you did 100%. This makes the 5x or 6x sound a bit less
    astounding.

    In other words, you get 25% to 50% more life out of your battery if
    you only discharge it a quarter each time. That's quite good, but not
    as impressive as the article sounds at first.



  12. #12
    Al Klein
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    On Tue, 02 Dec 2003 04:26:34 GMT, [email protected] (Charles Hawtrey)
    posted in alt.cellular.motorola:

    >According to Motorola, "The relationship between DOD (depth of
    >discharge) and cycle life is logarithmic. In other words, the number
    >of cycles yielded by a battery goes up exponentially the lower the
    >DOD. Research studies have shown that the typical cellular phone user
    >depletes their battery about 25 to 30 percent before recharging.
    >Testing has shown that at this low level of DOD a lithium-ion battery
    >can expect between 5 and 6 times the cycle numbers of a battery
    >discharged to the one hundred percent DOD level continuously."


    This assumes a properly conditioned battery.

    Proper conditioning consists of fully charging the battery (a 12 hour
    charge for the first charge won't hurt), fully discharging it (until
    the phone shuts off), and repeating the cycle. (It doesn't have to be
    discharged in one continuous use - just don't recharge it until it's
    fully discharged.) Then you can charge it every day or so.
    --
    Al - rukbat at optonline dot net



  13. #13
    Al Klein
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    On Thu, 4 Dec 2003 13:02:41 +0800, "tuned by RZO"
    <[email protected]> posted in alt.cellular.motorola:

    >Of course. The lower DOD means shorter usage between charges = more short
    >charges possible. But does it mean longer useful lifespan of the same
    >battery?


    Each particular LiIon battery has a maximum charge time/depth life.
    If you discharge it less each time, you can get more charge/discharge
    cycles, but the total life will be the same. IOW, if you can run for
    a week before the phone shuts off, you can charge the phone once/week
    or you can charge it every night, but it'll still start going bad in
    12-18 months (typically).
    --
    Al - rukbat at optonline dot net



  14. #14
    Al Klein
    Guest

    Re: How should i charge my li-ion battery of my cellphone?

    On 4 Dec 2003 01:53:03 -0800, [email protected]
    (gopi) posted in alt.cellular.motorola:

    >Very interesting article. I think the article is a bit unclear at
    >first, however. If the battery is linear, then you'd expect that by
    >discharging it 25% each time you'd get 4x as many charge/discharge
    >cycles as if you did 100%. This makes the 5x or 6x sound a bit less
    >astounding.


    >In other words, you get 25% to 50% more life out of your battery if
    >you only discharge it a quarter each time. That's quite good, but not
    >as impressive as the article sounds at first.


    If you discharge it 25% each time, you'll get 4 times the number of
    charge/discharge cycles. You're still getting exactly the same life
    from the battery. Instead of taking - to make up numbers - 10 watts
    out of the battery 100 times, you take 2.5 watts out of it 400 times.
    That's 1,000 watts, any way you look at it. If the phone uses 2
    watts/day, you get 500 days use out of the battery.

    Yes, you can charge it 4 times as many times, but so what?
    --
    Al - rukbat at optonline dot net



  15. #15
    Mike S.
    Guest

    Re: How should i charge my li-ion battery of my cellphone?


    In article <[email protected]>,
    Al Klein <[email protected]> wrote:
    >On Tue, 02 Dec 2003 04:26:34 GMT, [email protected] (Charles Hawtrey)
    >posted in alt.cellular.motorola:
    >
    >>According to Motorola, "The relationship between DOD (depth of
    >>discharge) and cycle life is logarithmic. In other words, the number
    >>of cycles yielded by a battery goes up exponentially the lower the
    >>DOD. Research studies have shown that the typical cellular phone user
    >>depletes their battery about 25 to 30 percent before recharging.
    >>Testing has shown that at this low level of DOD a lithium-ion battery
    >>can expect between 5 and 6 times the cycle numbers of a battery
    >>discharged to the one hundred percent DOD level continuously."

    >
    >This assumes a properly conditioned battery.
    >
    >Proper conditioning consists of fully charging the battery (a 12 hour
    >charge for the first charge won't hurt), fully discharging it (until
    >the phone shuts off), and repeating the cycle. (It doesn't have to be
    >discharged in one continuous use - just don't recharge it until it's
    >fully discharged.) Then you can charge it every day or so.


    According to a battery engineer who posts a lot on the battery newsgroup,
    this is a fallacy:


    From: Evgenij Barsukov <[email protected]>
    Newsgroups: sci.chem.electrochem.battery
    Subject: Re: Charging Li-Ion batteries
    Date: Fri, 13 Jun 2003 10:17:07 -0500
    Organization: Texas Instruments Incorporated

    GGreen wrote:
    >
    > Rumor has it that Li-Ions should be 'conditioned' when new. That
    > would entail charging completely, then running to a very low discharge
    > point, and cycling through that a couple times. After that initial
    > breakin cycle, it's OK to charge the battery at any time.
    >
    > I've seen that in print several times. Any basis for it?


    Actually conditioning (formation of semi-insulating layer on the anode particles)
    is done by battery manufacturers. They are required to make the formation cycle
    before they ship the cells. Formation is not completely finished in one charge cycle,
    so in case of some manufacturers who make only one formation cycle,
    cells will still show increased capacity loss during
    a comple of additional cycles.

    Also, most of new high capacity cells have increased useable
    capacity loss during first 10-20 cycles, and then capacity stabilizes.
    This has similar reason - still growing insulating layer increases cell impedance which
    in turn results in less useable capacity at high (say C/2) loads wich are common
    in notebooks, phones and PDAs.

    There is no need to deeply discharge the battery for make formation cycle.
    Insulating layer will be formed in the natural cause of battery usage (mostly
    during charging stage).

    Regards,
    Evgenij
    --

    __________________________________________________
    *science&fiction*free programs*fine art*phylosophy:
    http://sudy_zhenja.tripod.com
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