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Alkaline Battery

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Discussion in 'Power Electronics' started by raymondo, Sep 13, 2014.

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  1. Sep 13, 2014 #1
    raymondo

    raymondo

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    Sep 13, 2014
    I have a clock which says I must only use a Zinc Carbon battery and specifically says I must not use an alkaline battery. Why would that be - I use alkaline batteries in all of my other clocks and has never occurred to me to consider what type of battery I was using.
     
  2. Sep 13, 2014 #2
    davenn

    davenn Moderator

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    Sep 5, 2009
    Hi Raymondo
    welcome to EP :)

    That's an oddball one !
    I cant think of any good reason why an alkaline one couldn't be used

    Dave
     
  3. Sep 14, 2014 #3
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Can you still even get zinc carbon batteries?

    Is it possible that early alkaline batteries had a lower shelf life than zinc carbon?
     
  4. Sep 14, 2014 #4
    gamebox

    gamebox

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    Sep 14, 2014
    Perhaps the clock's electronics or electro-mechanics is sensitive to voltage/current, which is notably higher in alkalines?
    Does the clock contain any (white) LED? I have a few simplest torches with LEDs connected to batteries directly, using no voltage/current limiting electronics, and if alkalines are used there LEDs get damaged with too high current (zinc carbon's voltage tends to fall very quickly on any substantial load). I can safely use "weakened" alkalines there though - the ones that stop being usable in MP3 player, remote control, automatic blood pressure meter, and the like.
     
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