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q about battery life

Discussion in 'Electronic Basics' started by David Rafky, Sep 8, 2003.

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  1. David Rafky

    David Rafky Guest

    With regard to my walkman -- does changing the volume effect battery
    life? That is, if I turn "up" the volume, will this shorten the life of the

    This Q has been bugging me for years.

    Thanks to all.

    Dave R....
  2. Yes.
  3. robert

    robert Guest


    but wait for some *real* genius to come along and explain that it won't
    make all that much difference - i think most of the power would go to
    spinning the CD.

    if you get experimental, be careful of your ears!

    -- rob
  4. The audio power output amp is Class A and it draws more current as you turn
    up the volume.
    hank wd5jfr
  5. Inasmuch as when you increase the volume you increase the power input to the audio
    amplifier stage, which demands more current from the power supply, the answer has to be
  6. Rich Grise

    Rich Grise Guest

    As an insufferable pedant, I can't let this one pass. If it were a class
    A amp, the current would be constant. Which would be kind of a silly
    way to design battery stuff. They're practically all class AB, except
    for the high-end class Ds and Es. ;-)

    From personal experience: I got a 5" B&W TV at a pawn shop for $25. It
    takes 10 - count'em, ten - C cells. Which cost almost as much as the TV,
    and last about 3 hours. If you're a TV watcher, it's cheaper to get a
    hotel room. Anyway, toward the end of the battery life, I can see the
    raster shrink on audio peaks, almost like an upside-down VU meter. :)

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