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  1. #1
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    Asus laptop turned off abruptly with no warning

    Hi,

    My laptop Asus K53e has been turned off abruptly without giving any warnings of low batt level. What happens is that I was using it to watch online lectures on a battery mode, not plugged to the power source. At the start, I noted that the battery was 95% charge. After 45 minutes later, I checked the batt status and it was 50% or 1 hour. At this time, the movie was still playing. Then after about 10 minutes later, it just died with the screen going total blank.

    A few minutes later, I turned it back on and it was on but only for a short 2 minutes before it went dead again.

    I checked to make sure if it's overheating issue and found there was not much dust in the heat sink. And the laptop wasn't really hot. The laptop was on the desk the whole time of testing. Really bizarre. I wonder what might be the cause.

    Any help would be greatly appreciated.

    Thank you

  2. #2
    Plutonium Lounger Medico's Avatar
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    Your battery is dying. It does not hold a charge well. If this is a new PC, take the battery back. If it's more than a couple of years old, check on a new battery.

    Since the battery does appear to charge, it seems the charging system is OK. Does the laptop work well when plugged in?
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  3. #3
    Super Moderator CLiNT's Avatar
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    Yes, plug the laptop in to mains power and watch your lengthy video again.
    Repeat the above several times with power, and on battery as well. Allow the bat to charge to 100%.
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    Invest a little time and energy in a well thought out BACKUP regimen and you will have minimal down time, and headache.

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  4. #4
    WS Lounge VIP mrjimphelps's Avatar
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    If it turns out that you need to replace the battery, it would be a good idea to do the following, in order to keep the new battery in top condition:

    * About once every week or so, let the battery run down all the way, then charge it all the way. An easy way to do this is to log out of Windows and then unplug it, right before you go to bed; this will result in the battery completely running out of power during the night. Then when you wake up the next morning, plug it in; this will result in the battery getting a full charge.

    Obviously, if you need to take the laptop with you tomorrow morning, you shouldn't unplug it tonight. Select a night when the laptop will stay put the next morning, so that it will have time to get fully charged.

    By doing this, you prevent the battery from developing a "memory" and therefore a shrinking capacity.

  5. #5
    Super Moderator jwitalka's Avatar
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    A modern Lion battery does not suffer from the memory effect like the older NiCads did. See
    http://lifehacker.com/5875162/how-of...g-its-lifespan

    for recomendations for prolonging Lion batteries.
    Jerry

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  7. #6
    WS Lounge VIP mrjimphelps's Avatar
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    Quote Originally Posted by jwitalka View Post
    A modern Lion battery does not suffer from the memory effect like the older NiCads did. See
    http://lifehacker.com/5875162/how-of...g-its-lifespan

    for recomendations for prolonging Lion batteries.
    Jerry
    My last laptop (ca. 2009) had a battery with about 10 minutes of capacity -- about enough to fully load Windows, and then it would shut off. I never, ever conditioned the battery; I always left it plugged in except when I took it with me, which was about 1 week every month.

    A year and a half ago, I got a new laptop. I have faithfully conditioned the battery as I described above. The laptop will stay on for about an hour if it is not plugged in.

    Just sayin...

  8. #7
    Super Moderator jwitalka's Avatar
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    The 2009 battery could well have been a NiCad battery which does suffer from the memory effect. I have a year old laptop that gets 2 hours of battery life without any deliberate conditioning. But we all do what we are comfortable with.

    Jerry

  9. #8
    WS Lounge VIP mrjimphelps's Avatar
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    Quote Originally Posted by jwitalka View Post
    A modern Lion battery does not suffer from the memory effect like the older NiCads did. See
    http://lifehacker.com/5875162/how-of...g-its-lifespan

    for recomendations for prolonging Lion batteries.
    Jerry
    Very helpful info, Jerry, as is everything on that website.

  10. #9
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    About once every week or so, let the battery run down all the way
    Do not do this with a Lithium Ion battery. These will be damaged by repeatedly running flat.

    The ideal level for a Li-Ion battery is around 50% charge. Some high end laptops have an option to maintain the charge at 75% and 50% charge levels. For the rest of us, keeping it charged is the best approach, and try to avoid going below 10 or 20%.

    On the other hand the worst thing you can do is leave a fully charged battery in a hot car. A battery in this state has a full life expectancy of a months instead of several years.

  11. #10
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    From the Lateral Thinking Dept: check the little micro-switch under the lid. I've come across a few faulty ones that "think" you've closed the lid and switch off if you've got the option set.

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  13. #11
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    Your pack probably has at least one bad cell when compared to the others, Laptops generally shut down on low voltage sensed, not current available and if one cell goes flat output wise it may be reaching the shut off set point. Not much to do unless you like ripping it apart and locating the weak/bad cell and replacing it, which in itself. is not a good idea as it will not be well matched to the rest of the cells in number of charges left in those. Time for a new pack.

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