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Thread: Safe Minimal Battery Level

  1. #1
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    Safe Minimal Battery Level

    I have heard but never confirmed that your battery level should never drop below a certain percentage, or it will be damaged.

    What are normal battery use guidelines?

    I have a big 8 cell batter for my gazelle ultra. Its at 63% now. Down to which level can I safely run the battery?
    cmn

  2. #2
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    Re: Safe Minimal Battery Level

    Quote Originally Posted by cmnorton View Post
    I have heard but never confirmed that your battery level should never drop below a certain percentage, or it will be damaged.

    What are normal battery use guidelines?

    I have a big 8 cell batter for my gazelle ultra. Its at 63% now. Down to which level can I safely run the battery?
    There is internal protection in the battery that won't let it drop that low.

    jdb

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    Re: Safe Minimal Battery Level

    In addition to JDB's comment, letting the battery drop all the way down (as low as the internal protections will allow) doesn't so much *damage* the battery as it does wear it out prematurely. Every once in a while isn't a problem. But habitually running it all the way down has a cumulative effect on the battery's ultimate lifespan.
    To err is human, to forgive is very ... dog-like.

    Thomas Aaron
    FetchMasters, LLC

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    Re: Safe Minimal Battery Level

    Is 20% a safe place to stop? If not, 1/3, 40%?

    This is a gazelle ultra 8-cell.
    Last edited by cmnorton; February 9th, 2009 at 10:06 PM. Reason: add more
    cmn

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    Re: Safe Minimal Battery Level

    From what I understand, down to about 25% is a good place to stop. And again, we're all gonna run them all the way down occasionally.
    To err is human, to forgive is very ... dog-like.

    Thomas Aaron
    FetchMasters, LLC

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    Re: Safe Minimal Battery Level

    Not to thread-jack, but I had always been told that if you don't run batteries down all the way, they develop a "memory" point and never recharge properly. So that is bunk apparently?

    Thanks,
    jim
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  7. #7
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    Re: Safe Minimal Battery Level

    Quote Originally Posted by jpoRS View Post
    Not to thread-jack, but I had always been told that if you don't run batteries down all the way, they develop a "memory" point and never recharge properly. So that is bunk apparently?

    Thanks,
    jim
    It's true, but for a different kind of batteries.

    NiCads (Nickle Cadmium batteries) which used to be the universal rechargeable battery suffered from that problem.

    Li-ion (Lithium Ion batteries) are more popular now and almost exclusively what are found in laptops.

    They hold more energy than Nicads and don't have a charge memory.
    They are more particular about the way they are charged and most have some pretty sophisticated circuitry built in.
    They've been known to vent flames when not charged properly.

    jdb

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    Re: Safe Minimal Battery Level

    There is a lot of good battery information here http://www.batteryuniversity.com/

  9. #9
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    Re: Safe Minimal Battery Level

    Hmm. The more you know.

    Thanks guys,
    jim
    I think a nerd is a person who uses the telephone to talk to other people about telephones. And a computer nerd therefore is somebody who uses a computer in order to use a computer. -Douglas Adams
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