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% Charged--Two Readings: Why the Difference?

Discussion in 'Electronic Basics' started by W. Watson, Aug 10, 2007.

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  1. W. Watson

    W. Watson Guest

    I have a Xantera 600HD Power Pack and decided to try it out for a situation
    I might want to use it in. I wanted to see how long I could run a VCR and
    Epson S3 computer projector. I put in a tape 30 minute long and ran the two
    devices for 20 minutes. At the end of that time, I unplugged the two devices
    and turned off the PP. When I pressed the % charge button it showed 10%.
    After about 30 minutes I thought I'd charge up the battery and redo the test
    in a slightly different way. However, I decided to check the % charge and
    found it was now 50%. How does one explain this? BTW the two devices were
    doing just fine when I turned them off.
     
  2. Tom Biasi

    Tom Biasi Guest

    Batteries bounce back a little after a heavy discharge and those meters are
    not good for much.

    Tom
     
  3. Phil Allison

    Phil Allison Guest

    "W. Watson"


    ** See the name of this NG - asshole ?

    How does that simple, descriptive name suggest the detailed performance
    characteristics of some pile of fucking shit you bought somewhere = " on
    topic " ??????????



    ........ Phil
     
  4. sparky

    sparky Guest

    Philly: Did you take your ugly pills this morning?
     
  5. Al in Dallas

    Al in Dallas Guest

    He must have. It's rare to get an answer from him without the
    vituperation.
     
  6. W. Watson

    W. Watson Guest

    Still working off those DUIs?

     
  7. W. Watson

    W. Watson Guest

    Is there a meter that better reads out the charge more accurately?
     
  8. Tom Biasi

    Tom Biasi Guest

    When it come to percentage of charge left in the battery any meter is really
    just a guess.

    They take the discharge curve of the battery at the devices rated current
    and assign values on the curve until the device wont function.
    Many things disrupt the accuracy.

    Tom
     
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