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Author Topic: Duracell Quantum tested?  (Read 4125 times)
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Has anyone been able to verify the capacity of these?  AA are specified at 4000mah. 
What is the advantage of these new batteries?
They last 10 years?
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4AH, that's impressive for AA size. Are they rechargeabe?
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No.  I am skeptical about the capacity.  At what rate?  At least the price is reasonable.
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Where'd you see the 4000maH capacity?
http://www.duracell.com/en-us/innovation/hi-density-core-technology
I can't find any numbers posted here.
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Doesn't look like they have published a datasheet yet:
http://ww2.duracell.com/en-US/Global-Technical-Content-Library/Product-Data-Sheets.jspx

However this NY Times Article says the Ultra are being discontinued:
http://mobile.nytimes.com/2013/07/23/business/media/duracell-offers-praise-and-power-for-everyday-heroes.html

So it makes me think these are just rebranding of the Ultra, which is available on the datasheet site.

lol:
“Consumers associate red with more power, and we chose red to differentiate it and to highlight Quantum’s Hi-Density Core,” said Volker Kuhn, general manager of Duracell North America

They're red, that's how they have more Ah...
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Ah ha - Home Depot saying 3922maH
http://www.homedepot.com/p/Duracell-Quantum-Alkaline-AA-Batteries-8-Pack-004133366280/204286990#.UhDfdtKsjZk
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Really? They specify capacity to 4 digits?
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"Battery capacity (mAh)    3922"
Read it on the internet - must be true smiley-cool
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That is a great alkaline battery at 1.5 volts. My Nickel Metal Hydride AA cells are 1400 milliAmp Hours, but they are rechargeable to 1.2 volts. So 3900 mAH is more than triple the energy as my rechargeables.
1.5v * 3.922 Amps * 3600 seconds = 21000 Joules of Energy
1.2v * 1.4 A * 3600 sec = 6000 Joules of energy
« Last Edit: August 18, 2013, 10:31:35 am by AmbiLobe » Logged

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D cells can be rated at 14 Ah, but at very low discharge rates.
4Ah for an AA doesn't seem unreasonable.
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Compare a battery cost to a wall socket's electrical cost :
1 billion joules costs $120 from my wall socket.
How many batteries will give that much energy?

1 billiion Joules / 21 kiloJoules per AA battery = 47000 AA batteries

So find the value of the batteries to compare to a wall socket :

$120/47000 batteries =  $0.002 per battery.

But batteres cost $1.50 for an AA cell, not .2 cents.

According to this calculation, batteries are 750 times more expensive than a wall socket's electricity.



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Maybe more, but sometimes portability is needed.
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The original questions were:
"Has anyone been able to verify the capacity of these?  AA are specified at 4000mah.  "
No.

"What is the advantage of these new batteries?"
They last a longer time than some other AA batteries.

"They last 10 years?"
The shelf life of alkaline batteries can reach 7 to10 years. If a load is put on the battery, yes, they can drive a small load for 7 to 10 years.
http://www.alkalinebatteries.us/Shelf_life_of_Alkaline_Batteries.html

For example, a NAND gate in the following link's Figure 41 uses 1 femtojoule to switch with a fanout of two.
https://smartech.gatech.edu/bitstream/handle/1853/31652/wunderlich_richard_b_200912_masters.pdf;jsessionid=A8FC50BF5BD90D3F800BA9A55B742329.smart2?sequence=1
Running at 1 Ghz, it uses one microjoule per second. So the AA cell with 21000 joules can last for  21 billion seconds, unless that is more than the shelf life of 7 years.

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
Home electricity cost from wall socket example calculation:

11 cents per kilowatt hour (kwh) in New England
or
43 cents per kwh in Hawaii

one kilowatt hour is 1000 watts * 3600 seconds = 3.6 megajoules

in New England, USA
(11 cents/kwh) * (1 kwh/3.6Mjoules) * (1 billion joules) = $30.55

in Hawaii, USA
(43 cents/kwh) * (1 kwh/3.6Mjoules) * (1 billion joules) = $120
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

AA cell battery cost to run a household that spends $200 per month on electricity

Compare a battery cost to a wall socket's electrical cost :
1 billion joules costs $30.55 from my wall socket.
How many batteries will give that much energy?

1 billion Joules / 21 kiloJoules per AA battery = 47000 AA batteries

So find the value of the batteries to compare to a wall socket :

$30.55/47000 batteries =  $0.00065 per battery.

But batteres cost $1.50 for an AA cell, not .065 cents.

According to this calculation, batteries are 2307 times more expensive than a wall socket's electricity in New England.

So it would cost 2307 * $200 to power a house using AA cells for a month.
That is $460,000 of AA cells to supply electrical energy to a house for one month.

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

The AA cell battery has 21000 joules. If that energy could be used in one second it would have a horsepower of:

21000 J * (1 horsepower/745 watts) * (1 watt*second/joule) = 28 horsepower second
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No.  I am skeptical about the capacity.  At what rate?  At least the price is reasonable.

Alkalines do not generally like really high discharge rates.  It plays havoc with their chemistry.  I see no reason to to believe these are substantially better in this respect.  If you need high peak discharge rates, Lithium are probably still your best bet, even though they are ridiculously (and unnecessarily, IMHO) expensive.
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