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Thread: Understanding mah vs ma?

  1. #1
    tesco's Avatar woowoo
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    Was just wondering how do you figure out how long a battery lasts if the device uses 100ma and the battery is 600mah?
    What is a mah? 600 milli-amp hours?

  2. Software & Hardware   -   #2
    Virtualbody1234's Avatar Forum Star BT Rep: +2
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    Yes mah is milli-amp hours.

    A 600 mah battery can supply 600 ma for 1 hour.
    or
    A 600 mah battery can supply 100 ma for 6 hours.

    Approximately.

  3. Software & Hardware   -   #3
    tesco's Avatar woowoo
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    kool that makes perfect sense.

    Can you explain kwh too? If a fridge uses 400kwh it's not really 400kw per hour is it

  4. Software & Hardware   -   #4
    Virtualbody1234's Avatar Forum Star BT Rep: +2
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    Yes. Kwh is kilo watts per hour.

    1 kwh is 1000 watts consumption for a period of 1 hour
    or
    1 kwh is 100 watts consumption for a period of 10 hours.

    Don't know about your fridge rating. Maybe yearly consumption or something? You better check that.

    What exactly does the label say?
    Last edited by Virtualbody1234; 10-20-2006 at 02:31 AM.

  5. Software & Hardware   -   #5
    Seedler's Avatar T__________________T
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    Quote Originally Posted by rossco View Post
    kool that makes perfect sense.

    Can you explain kwh too? If a fridge uses 400kwh it's not really 400kw per hour is it
    400kw per hour

    Do you lyke, own a cooling station or something.
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  6. Software & Hardware   -   #6
    Virtualbody1234's Avatar Forum Star BT Rep: +2
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    He uses it to cool his CPU!

  7. Software & Hardware   -   #7
    Seedler's Avatar T__________________T
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    Quote Originally Posted by Virtualbody1234 View Post
    He uses it to cool his CPU!
    Pentium 7?
    Biostar XE T5
    i5-750 @ 4.0 GHZ stable (CM Hyper 212)
    2 x 2GB Cosair XMS3 DDR3 1600MHZ
    Radeon 5850 @ 866/1254MHZ
    Intel X25-M in RAID 0
    WD Caviar Black 2TB in RAID 0
    3 x Asus 25.5" VW266H LCD [Eyefinity]

  8. Software & Hardware   -   #8
    harrycary's Avatar Poster
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    The compressor in the frig, particularly the motor in the compressor, would and could draw large amounts of current.

    Electric motors, without a doubt, draw large amounts of current in any application or use.

    This is why solid state devices, such as flash-based mp3 palyers, have a long battery life. Compare this to hard-drive based players which use up batteries much quicker.

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