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Thread: Battery Life Tested and Tracked - the Results Show

  1. #41
    Jazz
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    Designed capacity: 30657 mWh
    Fully charged capacity: 28125 mWh
    Wear level 8%
    -----
    nothing's changed after full discharging and full charging in 8hours
    Someone like me? What should I do???
    battery-report.zip

  2. #42
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    Quote Originally Posted by Maine_Coon View Post
    11% battery loss in 24 hours, brightness 100%, wifi and BT on, nothing turned off, just closed the lid.

    I can live with this.
    Very reasonable indeed.
    Just think how nice it will be when Microsoft gets their WIN8.1 fixes in!
    Maine_Coon likes this.
    OWNER OF ASUS 64GB T100TA w/128GB microSD, and now running Windows 10

  3. #43
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    Quote Originally Posted by ndbpro View Post
    Anyone have any suggestions on getting the lost capacity back?
    Has anyone been able to validate that the program used to measure battery capacity is 100% accurate?

    The reason I ask is that in the past...I have seen 5-6 different utilities of this nature produce 5-6 different results.

    Just wondering.
    OWNER OF ASUS 64GB T100TA w/128GB microSD, and now running Windows 10

  4. #44
    Soundwave
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    Looks like my post got deleted.

    Is that normal for this Forum to delete posts?

    I also am loosing capacity on my new TF Book

    Batteryreport is a built in feature of WIndows 8

    Designed capacity: 30675 mWh
    Fully charged capacity: 28088 mWh

    Every single time I charge it, I loose capacity. Yesterday is was 28108 and today 28088. Im betting tomorrow it will be down below 28000.

    Asus's Tech support is something to be desired. They want me to send in my brand new tablet for repair, rather than loose a customer and send me a replacement.

    Anyone know of any way to get the lost capacity back?

  5. #45
    Jazz
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    Quote Originally Posted by ASUSFAN0001 View Post
    Has anyone been able to validate that the program used to measure battery capacity is 100% accurate?

    The reason I ask is that in the past...I have seen 5-6 different utilities of this nature produce 5-6 different results.

    Just wondering.
    #44 has same issue with me
    Battery report is a feature of windows 8.1
    and 2 other tools (everest and battery care) also produce same result

  6. #46
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    Quote Originally Posted by Grenalis View Post
    Looks like my post got deleted.

    Is that normal for this Forum to delete posts?

    I also am loosing capacity on my new TF Book

    Batteryreport is a built in feature of WIndows 8

    Designed capacity: 30675 mWh
    Fully charged capacity: 28088 mWh

    Every single time I charge it, I loose capacity. Yesterday is was 28108 and today 28088. Im betting tomorrow it will be down below 28000.

    Asus's Tech support is something to be desired. They want me to send in my brand new tablet for repair, rather than loose a customer and send me a replacement.

    Anyone know of any way to get the lost capacity back?
    Not at this time I suspect.

    What's really in play is that some things (services, apps, programs, etc.) seem to be erroneously operating even when the T100 is supposedly "sleeping". That could end up using battery such that the capacity never reaches the max.

    No firm answers...but following various leads on this topic.
    OWNER OF ASUS 64GB T100TA w/128GB microSD, and now running Windows 10

  7. #47
    Soundwave
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    OK people. I have been doing some testing and research, and what I have found is very interesting. The batteries in these units do not like to be deep cycled, ie. fully charged and fully discharged, every time, like we do with our phones and laptops, to keep the battery good. Once you have done the fully charge, fully discharge 2 - 3 times, your batteryreport should show somewhere around 28,800 W hr, of full capacity. Now just use the tablet like normal, charging it when it gets low, not when its almost dead, and you will noticed the capacity begin to creek back up to the ~31,000 W hr mark. I have already gotten back up to 28,752 W hr, from 28,088 W hr, in 2 charges from about 15%. You should still deep cycle discharge / charge about once a month, but no more then that, to keep the battery to hold its charge and capacity. I hope this helps alleviate worries out there on diminishing charge capacity.

  8. #48
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    Quote Originally Posted by Grenalis View Post
    OK people. I have been doing some testing and research, and what I have found is very interesting. The batteries in these units do not like to be deep cycled, ie. fully charged and fully discharged, every time, like we do with our phones and laptops, to keep the battery good. Once you have done the fully charge, fully discharge 2 - 3 times, your batteryreport should show somewhere around 28,800 W hr, of full capacity. Now just use the tablet like normal, charging it when it gets low, not when its almost dead, and you will noticed the capacity begin to creek back up to the ~31,000 W hr mark. I have already gotten back up to 28,752 W hr, from 28,088 W hr, in 2 charges from about 15%. You should still deep cycle discharge / charge about once a month, but no more then that, to keep the battery to hold its charge and capacity. I hope this helps alleviate worries out there on diminishing charge capacity.
    Thank you for sharing. Good info.
    OWNER OF ASUS 64GB T100TA w/128GB microSD, and now running Windows 10

  9. #49
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    I did a new test today.

    All I did was charge to 100%, and then before hitting the power button...change the charm switch to Airplane Mode (WIFI off).

    After 10 hours...the T100 here still has 97% power remaining. Not bad.
    OWNER OF ASUS 64GB T100TA w/128GB microSD, and now running Windows 10

  10. #50
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    Quote Originally Posted by Grenalis View Post
    OK people. I have been doing some testing and research, and what I have found is very interesting. The batteries in these units do not like to be deep cycled, ie. fully charged and fully discharged, every time, like we do with our phones and laptops, to keep the battery good. Once you have done the fully charge, fully discharge 2 - 3 times, your batteryreport should show somewhere around 28,800 W hr, of full capacity. Now just use the tablet like normal, charging it when it gets low, not when its almost dead, and you will noticed the capacity begin to creek back up to the ~31,000 W hr mark. I have already gotten back up to 28,752 W hr, from 28,088 W hr, in 2 charges from about 15%. You should still deep cycle discharge / charge about once a month, but no more then that, to keep the battery to hold its charge and capacity. I hope this helps alleviate worries out there on diminishing charge capacity.
    You're absolutely correct. But then no lithium based batteries like being deep cycled. Lithium based batteries benefit from frequent, small charges as the heat & "stress" caused by deep cycling (which is a residual technique from back in the bad old days of ni-cads) actually causes lithium based batteries to wear far more quickly than if smaller charges take place.

    The best bet for any lithium based battery is to keep it charged - but don't keep it permanently connected to a charger. The optimum charging point for lithium battery longevity (in wear/cycle terms) is to charge at around 50% of capacity. Also charge from around 15% to full once every 8-10 weeks or so to maintain the accurate reporting of the battery life in software

    You can study this subject in a lot more depth (if it interests you ) at the Battery University.

    All the best
    Last edited by janner43; 12-24-2013 at 03:32 AM.

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