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    Why are nine-volt batteries rectangular?

    Question #119102. Asked by star_gazer. (Dec 03 10 9:53 AM)


    serpa

    		If I remember correctly, six 1.5V AAAA batteries are connected in series. (6X1.5 =9)

    Dec 03 10, 10:41 AM
    looney_tunes

    		There's a picture here of a dissected 9V battery, showing 5 of the 6 AAAA cells that are bundled inside the roughly rectangular casing. The carbon-zinc cell that was originally used involves a chemical reaction which produces 1.5V of electric potential difference across its terminals. Joining them in series produces 6 x 15 = 9 volts.

    http://en.wikipedia.org/wiki/Nine-volt_battery

    Dec 04 10, 12:07 AM

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