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PostPosted: 09.09.2012 04:35 
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Joined: 26.05.2007 10:06
Posts: 128
Location: Texas
Hello everyone, long time no see. Grin... Great news, I have some time to have some fun and LEARN !

So here goes...

I have three store bought lights that has 72 LED's each in them.

Each light runs off of 4 AA batteries.

Is there a simple way of using 4 D cell batteries to power all three lights.

My thinking is D cell batteries have a larger size so they in general would last longer than AA cell batteries.

Could I not just have a - and + wire running from each of the lights into battery box that has 4 D's in it?

Any input (as always) is appreciated...


Thanks,


Dan


BTW - Because I have some time, I'm gonna play a game that I haven't played in a VERY LONG TIME. (Star Wars Galactic Battle Ground) OK You can laugh now. grin...


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PostPosted: 09.09.2012 10:54 
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Joined: 24.01.2002 10:09
Posts: 4683
Location: Finland
Hi.

Long time no see indeed. :)

And yes, you are correct, just hook the led lights in parallel to a single source and you should be golden. Here is a nice page that tries to indicate the power differences on different battery sizes:

http://www.allaboutbatteries.com/Energy-tables.html

So, the alkaline long-life variant of the size D can supply roughly 8 times the power as the AA variant (8 times the running time). Sooo... in the sense you would need 8 AA batteries connected in parallel to be able to run the lights as long as from the single D battery.

Well, this is the theory at least. I'm quite sure we can't just compare these numbers this directly but the four D batteries in series should run fine for you. :)

-J

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PostPosted: 09.09.2012 11:28 
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Joined: 26.05.2007 10:06
Posts: 128
Location: Texas
I'm sure we have talked about something like this SOMEWHERE before, but it honestly is good to hear and see it again...

Dan


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