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Was "how much current does a flashlight battery offer"

Discussion in 'Electronic Basics' started by Tim, Sep 4, 2004.

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  1. Tim

    Tim Guest

    Looking at a smaller scale, does anyone have an idea what may be available
    in very small lithium cells? I am looking for maximum battery life in the
    smallest physical package, but also something that is available commercialy.
    By small, I am hoping for 3or 6v from button cell, or preferably a slender
    cylinder shape..perhaps a "micro AA"

    Any pointers ?

    Thanks

    Tim
     
  2. Tom Biasi

    Tom Biasi Guest

    The best pointer that I can give you is to look at the manufacturer's specs.
     
  3. Kevin Kilzer

    Kevin Kilzer Guest

    You've changed the question. Total battery life depends on both the
    battery capacity (related to its composition and size), and the load
    current (related to your skill as a designer). Available current
    (your earlier post), is related to the battery design.

    The manufacture should be able to give the capacity, usually in
    amp-hours or milliamp-hours. Determine your load current and divide;
    the answer is in units of time.

    The available current is a little trickier and is related to the
    impedance (resistance) of the battery, which you will probably find on
    the data sheet. Battery impedance will go up as the battery charge
    goes down, so it is not a simple number in most cases.

    Kevin
     
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