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Science Discussion: 3000 Farad Ultracapacitors, Cheap Used SurplusGroup: sci.electronics.basics
Discussion: 3000 Farad Ultracapacitors, Cheap Used Surplus
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Wbeaty
Wed, 3 Nov 2010 22:42:56 -0700 (PDT)
Hey, 'electronics goldmine' has some used surplus Maxwell Boostcaps
for $29. I just ordered a couple.

2.7VDC, max amps:147, peak amps 1 second:2170, 3020 watt, 3.04watt-
hours

http://www.goldmine-elec-products.com/products.asp?dept=1028
http://www.maxwell.com/ultracapacitors/products/large-cell/bcap3000.asp
http://www.maxwell.com/ultracapacitors/datasheets/DATASHEET_K2_SERIES_1015370.pdf
http://www.youtube.com/watch?v=QUC505hnwI4
http://www.youtube.com/watch?v=Rq7pDgcTAdY

Now I just received email ads from them for a $20 version, only 2600
Farads,
ten for $15 each. http://www.goldmine-elec-products.com/prodinfo.asp?number=G17960


(((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
William J. Beaty http://staff.washington.edu/wbeaty/
beaty, chem washington edu Research Engineer
billb, amasci com UW Chem Dept, Bagley Hall RM74
206-543-6195 Box 351700, Seattle, WA 98195-1700


Default
Nov 04, 2010 - 09:38:33 am EST
On Wed, 3 Nov 2010 22:42:56 -0700 (PDT), wbeaty
wrote:

>
>Hey, 'electronics goldmine' has some used surplus Maxwell Boostcaps
>for $29. I just ordered a couple.
>
>2.7VDC, max amps:147, peak amps 1 second:2170, 3020 watt, 3.04watt-
>hours
>
> http://www.goldmine-elec-products.com/products.asp?dept=1028
> http://www.maxwell.com/ultracapacitors/products/large-cell/bcap3000.asp
> http://www.maxwell.com/ultracapacitors/datasheets/DATASHEET_K2_SERIES_1015370.pdf
> http://www.youtube.com/watch?v=QUC505hnwI4
> http://www.youtube.com/watch?v=Rq7pDgcTAdY
>
>Now I just received email ads from them for a $20 version, only 2600
>Farads,
>ten for $15 each. http://www.goldmine-elec-products.com/prodinfo.asp?number=G17960
>
Gold mine does that often. New items tend to be "on sale" a week or
month later too.

I'm curious to know how you plan to use them and (if in series) how
you plan to balance the charge?



John Larkin
Nov 04, 2010 - 10:21:47 am EST
On Wed, 3 Nov 2010 22:42:56 -0700 (PDT), wbeaty
wrote:

>
>Hey, 'electronics goldmine' has some used surplus Maxwell Boostcaps
>for $29. I just ordered a couple.
>
>2.7VDC, max amps:147, peak amps 1 second:2170, 3020 watt, 3.04watt-
>hours

A couple of AA batteries can do that!

John




Winston
Nov 04, 2010 - 12:31:29 pm EST
John Larkin wrote:
> On Wed, 3 Nov 2010 22:42:56 -0700 (PDT), wbeaty
> wrote:
>
>>
>> Hey, 'electronics goldmine' has some used surplus Maxwell Boostcaps
>> for $29. I just ordered a couple.
>>
>> 2.7VDC, max amps:147, peak amps 1 second:2170, 3020 watt, 3.04watt-
>> hours
>
> A couple of AA batteries can do that!

Huh? :)

http://www.batterystore.com/Eveready/EvereadyPDF/AppMan_Alkaline.pdf

Eveready says 'short circuit' current for their AA cells can be as
low as 5 A and still be within spec. Thats about what, 0.23% of the
capacitor peak current?

--Winston



John Fields
Nov 04, 2010 - 12:42:07 pm EST
On Thu, 04 Nov 2010 07:21:47 -0700, John Larkin
wrote:

>On Wed, 3 Nov 2010 22:42:56 -0700 (PDT), wbeaty
>wrote:
>
>>
>>Hey, 'electronics goldmine' has some used surplus Maxwell Boostcaps
>>for $29. I just ordered a couple.
>>
>>2.7VDC, max amps:147, peak amps 1 second:2170, 3020 watt, 3.04watt-
>>hours
>
>A couple of AA batteries can do that!

---
How many cells in the batteries?

---
JF



Winston
Nov 04, 2010 - 03:39:03 pm EST
John Fields wrote:
> On Thu, 04 Nov 2010 07:21:47 -0700, John Larkin
> wrote:
>
>> On Wed, 3 Nov 2010 22:42:56 -0700 (PDT), wbeaty
>> wrote:
>>
>>>
>>> Hey, 'electronics goldmine' has some used surplus Maxwell Boostcaps
>>> for $29. I just ordered a couple.
>>>
>>> 2.7VDC, max amps:147, peak amps 1 second:2170, 3020 watt, 3.04watt-
>>> hours
>>
>> A couple of AA batteries can do that!
>
> ---
> How many cells in the batteries?

Google results:

'shop "AA cell"' gets 28,500 hits
'shop "AA battery"' gets 470,000 hits

The motion is carried 16.5:1
One cell per battery.

(You had a witty response, though.) :)

--Winston



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