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Dumb question about flashlight batteries

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  • Member since
    March 2005
  • From: New Brighton, MN
  • 4,393 posts
Dumb question about flashlight batteries
Posted by ARTHILL on Thursday, April 10, 2008 9:48 AM

I just don't know who the dumb one is.

I was in a Radio Shack yesterday and the clerk told me all size 1.5V batteries last the same amount of time and that if you connect two batteries together you always get 3V.

I thought larger batteries lasted longer and if you hook a group of 1.5V batteries together in parallel you still have 1.5V.

Who has this right?

If you think you have it right, your standards are too low. my photos http://s12.photobucket.com/albums/a235/ARTHILL/ Art
  • Member since
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  • From: Oakley Ca
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Posted by dwbeckett on Thursday, April 10, 2008 10:07 AM

If the batteries are connected +-+- the voltage is 3V if connected --++ then it's 1.5v and size matter's a d size last's longer then AAA.

Dave 

The head is gray, hands don't work , back is weak, legs give out, eyes are gone, money go's and my wife still love's Me.

  • Member since
    December 2001
  • From: Pennsylvania
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Posted by nedthomas on Thursday, April 10, 2008 10:14 AM
If the AAA battery is supplying the same load as a D battery the D will last longer. If the AAA has a small load and A D cell a larger load they may last the the same time.
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Posted by BlueHillsCPR on Thursday, April 10, 2008 10:24 AM

As usual the Crappy Shack minion doesn't have a clue! Confused [%-)]

One of the reasons why I don't really miss Radio Shack all that much. 

  • Member since
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  • From: Southwest US
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Posted by tomikawaTT on Thursday, April 10, 2008 11:54 AM

Starting with the basic 1.5V flashlight battery, if you connect them in series, adding one battery increases the voltage 1.5V - out to the ridiculous of connecting 100 batteries end-to-end to get 150 volts.

If one battery is connected in parallel to a second battery, that increases the total amperage available to the circuit while maintaining a 1.5V output.

Flashlight cells of any size or combination of sizes can be connected in parallel without problems.  Cells in series should all be the same size, since the current output of the circuit will be that of the smallest-capacity cell in series.  Theoretically, it would be possible to put a AAA cell in series with a 6V lantern battery to get 7.5V output - but the current would be limited to that of the AAA cell.

Chuck (modeling Central Japan in September, 1964)

  • Member since
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  • From: Bedford, MA, USA
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Posted by MisterBeasley on Thursday, April 10, 2008 11:56 AM

Radio $hack clerks don't last very long, no matter what size they are.

As usual, MR forum advice is better than what you'll get from most generic retail types.  The sad part it, he's really ill-informed, and a lot of his customers don't realize that they're getting advice from someone who's relatively knowledge-free himself.

It takes an iron man to play with a toy iron horse. 

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Posted by BlueHillsCPR on Thursday, April 10, 2008 12:09 PM
 MisterBeasley wrote:

Radio $hack clerks don't last very long, no matter what size they are.

Laugh [(-D]

 MisterBeasley wrote:

As usual, MR forum advice is better than what you'll get from most generic retail types.  The sad part it, he's really ill-informed, and a lot of his customers don't realize that they're getting advice from someone who's relatively knowledge-free himself.

Aint that the truth! 

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  • From: Orig: Tyler Texas. Lived in seven countries, now live in Sundown, Louisiana
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Posted by jeffrey-wimberly on Thursday, April 10, 2008 1:04 PM
 MisterBeasley wrote:

Radio $hack clerks don't last very long, no matter what size they are.

As usual, MR forum advice is better than what you'll get from most generic retail types.  The sad part it, he's really ill-informed, and a lot of his customers don't realize that they're getting advice from someone who's relatively knowledge-free himself.

The store here in Leesville is an exception to that rule. Two of the clerks working there have been there for nearly fifteen years and are very knowledgeable about everything they sell.

Running Bear, Sundown, Louisiana
          Joined June, 2004

Dr. Frankendiesel aka Scott Running Bear
Space Mouse for president!
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beatus homo qui invenit sapientiam


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Posted by cacole on Friday, April 11, 2008 11:43 AM

The clerks at my local Radio $hack have obviously taken a course in Stupidity 101, or they think I just fell off the turnip truck.  They don't have a clue about anything but the cell phones they hawk.  Asking $59.95 for a digital camera battery that I can get online for $5.95 or at Wal-mart next door for $10.98.

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