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  1. #11
    tuned by RZO
    Guest

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

    "CharlesH" <hoch@exemplary.invalid> wrote in message
    news:bqina812cr5@enews3.newsguy.com...
    | In article <3fcd134b.48109812@News.CIS.DFN.DE>,
    | Charles Hawtrey <chawtrey@yahoo.com> wrote:
    | >lionhearted@ureach.com (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.





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



  2. #12
    tuned by RZO
    Guest

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

    "Charles Hawtrey" <chawtrey@yahoo.com> wrote in message
    news:3fcd134b.48109812@News.CIS.DFN.DE...
    | lionhearted@ureach.com (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





  3. #13
    tuned by RZO
    Guest

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

    "Charles Hawtrey" <chawtrey@yahoo.com> wrote in message
    news:3fcd134b.48109812@News.CIS.DFN.DE...
    | lionhearted@ureach.com (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





  4. #14
    gopi
    Guest

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

    chawtrey@yahoo.com (Charles Hawtrey) wrote in message news:<3fcd134b.48109812@News.CIS.DFN.DE>...
    > 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.



  5. #15
    gopi
    Guest

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

    chawtrey@yahoo.com (Charles Hawtrey) wrote in message news:<3fcd134b.48109812@News.CIS.DFN.DE>...
    > 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.



  6. #16
    Al Klein
    Guest

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

    On Tue, 02 Dec 2003 04:26:34 GMT, chawtrey@yahoo.com (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



  7. #17
    Al Klein
    Guest

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

    On Tue, 02 Dec 2003 04:26:34 GMT, chawtrey@yahoo.com (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



  8. #18
    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"
    <NOSPAMmillajovovich@softhome.net> 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



  9. #19
    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"
    <NOSPAMmillajovovich@softhome.net> 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



  10. #20
    Al Klein
    Guest

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

    On 4 Dec 2003 01:53:03 -0800, bb+graffiti.spam.gopi@andrew.cmu.edu
    (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



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