D Cell battery current 
Author Message
 D Cell battery current

I have a Duracell D battery that has a voltage of 1.5V.  I am curious
on how much current I can expect to draw from this batter.  Wikipedia
shows that for a standard D cell alkaline battery the capacity is
20500 (mAh). Does this mean that each battery should be able to
provide 20 A h?

My system draws about 1A so it should run for 20 hours? Unfortunately
the battery doesn't seem to be giving me back that much current and I
was hoping if someone could explain what is going on.  In fact when I
first power up my system there is a surger of current drawn and the D
cells don't seem to handle that well.

How can I figure how much current the D cell battery is rated to
provided? I don't see anything on the packaging.

If I need more current with the same batteries what should I do? Line
them up in parallel? Will this double the current?

Thanks for your thoughts.

-Henk



Mon, 04 Jan 2010 14:13:48 GMT
 D Cell battery current

Quote:

> I have a Duracell D battery that has a voltage of 1.5V.  I am curious
> on how much current I can expect to draw from this batter.  Wikipedia
> shows that for a standard D cell alkaline battery the capacity is
> 20500 (mAh). Does this mean that each battery should be able to
> provide 20 A h?

> My system draws about 1A so it should run for 20 hours? Unfortunately
> the battery doesn't seem to be giving me back that much current and I
> was hoping if someone could explain what is going on.  In fact when I
> first power up my system there is a surger of current drawn and the D
> cells don't seem to handle that well.

> How can I figure how much current the D cell battery is rated to
> provided? I don't see anything on the packaging.

> If I need more current with the same batteries what should I do? Line
> them up in parallel? Will this double the current?

> Thanks for your thoughts.

> -Henk

   http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida



Mon, 04 Jan 2010 14:31:19 GMT
 D Cell battery current

"Dutchman"

Quote:
>I have a Duracell D battery that has a voltage of 1.5V.  I am curious
> on how much current I can expect to draw from this batter.  Wikipedia
> shows that for a standard D cell alkaline battery the capacity is
> 20500 (mAh). Does this mean that each battery should be able to
> provide 20 A h?

**  Only if discharged over a long period   -  like 100 hours.

    Plus you call 0.9 volts the end.

Quote:
> My system draws about 1A so it should run for 20 hours?

** See the maker's data:

http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

Be lucky to make 3 hours.

Quote:
> How can I figure how much current the D cell battery is rated to
> provided? I don't see anything on the packaging.

** See the maker's data:

http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

Quote:
> If I need more current with the same batteries what should I do?

**  Use a  NiCd  or NiMH rechargeable.

 A D size one of of them will give you 1 amp  for 5 hours  or  more.

..........  Phil



Mon, 04 Jan 2010 14:51:07 GMT
 D Cell battery current
Quote:

> "Dutchman"

>>I have a Duracell D battery that has a voltage of 1.5V.  I am curious
>>on how much current I can expect to draw from this batter.  Wikipedia
>>shows that for a standard D cell alkaline battery the capacity is
>>20500 (mAh). Does this mean that each battery should be able to
>>provide 20 A h?

> **  Only if discharged over a long period   -  like 100 hours.

>     Plus you call 0.9 volts the end.

>>My system draws about 1A so it should run for 20 hours?

> ** See the maker's data:

> http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

> Be lucky to make 3 hours.

>>How can I figure how much current the D cell battery is rated to
>>provided? I don't see anything on the packaging.

> ** See the maker's data:

> http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

>>If I need more current with the same batteries what should I do?

> **  Use a  NiCd  or NiMH rechargeable.

>  A D size one of of them will give you 1 amp  for 5 hours  or  more.

> ..........  Phil

Huh?

Total energy storage of NiCd or NiMH is much less than primary
batteries. Although higher current, time to discharge is much shorter.

Lithium D's provide best energy density with high current.

--
Many thanks,

Don Lancaster                          voice phone: (928)428-4073
Synergetics   3860 West First Street   Box 809 Thatcher, AZ 85552

Please visit my GURU's LAIR web site at http://www.tinaja.com



Mon, 04 Jan 2010 17:31:26 GMT
 D Cell battery current

"Don Lancaster"

Quote:

>> "Dutchman"

>>>I have a Duracell D battery that has a voltage of 1.5V.  I am curious
>>>on how much current I can expect to draw from this batter.  Wikipedia
>>>shows that for a standard D cell alkaline battery the capacity is
>>>20500 (mAh). Does this mean that each battery should be able to
>>>provide 20 A h?

>> **  Only if discharged over a long period   -  like 100 hours.

>>     Plus you call 0.9 volts the end.

>>>My system draws about 1A so it should run for 20 hours?

>> ** See the maker's data:

>> http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

>> Be lucky to make 3 hours.

>>>How can I figure how much current the D cell battery is rated to
>>>provided? I don't see anything on the packaging.

>> ** See the maker's data:

>> http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

>>>If I need more current with the same batteries what should I do?

>> **  Use a  NiCd  or NiMH rechargeable.

>>  A D size one of of them will give you 1 amp  for 5 hours  or  more.

> Huh?

> Total energy storage of NiCd or NiMH is much less than primary batteries.

** Utter bollocks.

Go look up the data instead of citing fallacies.

Recent AA NiMH cells have more capacity than AA alkalines.

Sanyo NiMH  D cells are rated up to  8.5 AH with a 10 amp discharge and 7 AH
at 40 amp discharge.

http://sanyo.wslogic.com/pdf/pdfs/HR-DU.pdf

.......  Phil



Mon, 04 Jan 2010 18:12:21 GMT
 D Cell battery current
The ma-hr rating is taken at a current that is 1/10th of the rating.
You cold measure the short circuit current 'real quick' with a small
resistance. You caould also time how long it takes to discharge thru a
1 ohm R for example.


Tue, 05 Jan 2010 01:15:28 GMT
 D Cell battery current
Thanks for the great info guys!!! :)


Tue, 05 Jan 2010 01:52:27 GMT
 D Cell battery current


Quote:
>I have a Duracell D battery that has a voltage of 1.5V.  I am curious
> on how much current I can expect to draw from this batter.  Wikipedia
> shows that for a standard D cell alkaline battery the capacity is
> 20500 (mAh). Does this mean that each battery should be able to
> provide 20 A h?

> My system draws about 1A so it should run for 20 hours? Unfortunately
> the battery doesn't seem to be giving me back that much current and I
> was hoping if someone could explain what is going on.  In fact when I
> first power up my system there is a surger of current drawn and the D
> cells don't seem to handle that well.

> How can I figure how much current the D cell battery is rated to
> provided? I don't see anything on the packaging.

> If I need more current with the same batteries what should I do? Line
> them up in parallel? Will this double the current?

> Thanks for your thoughts.

> -Henk

Google the 'Peukerts effect' it applies to lead acid batteries, and in some
cases can be applied to others.
The limiting factor for discharge current is internal resistance.

Cheers



Tue, 05 Jan 2010 07:45:27 GMT
 D Cell battery current

Quote:

> "Don Lancaster"

>>> "Dutchman"

>>>>I have a Duracell D battery that has a voltage of 1.5V.  I am curious
>>>>on how much current I can expect to draw from this batter.  Wikipedia
>>>>shows that for a standard D cell alkaline battery the capacity is
>>>>20500 (mAh). Does this mean that each battery should be able to
>>>>provide 20 A h?

>>> **  Only if discharged over a long period   -  like 100 hours.

>>>     Plus you call 0.9 volts the end.

>>>>My system draws about 1A so it should run for 20 hours?

>>> ** See the maker's data:

>>> http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

>>> Be lucky to make 3 hours.

>>>>How can I figure how much current the D cell battery is rated to
>>>>provided? I don't see anything on the packaging.

>>> ** See the maker's data:

>>> http://www.duracell.com/oem/Pdf/new/MN1300_US_CT.pdf

>>>>If I need more current with the same batteries what should I do?

>>> **  Use a  NiCd  or NiMH rechargeable.

>>>  A D size one of of them will give you 1 amp  for 5 hours  or  more.

>> Huh?

>> Total energy storage of NiCd or NiMH is much less than primary batteries.

> ** Utter bollocks.

> Go look up the data instead of citing fallacies.

> Recent AA NiMH cells have more capacity than AA alkalines.

> Sanyo NiMH  D cells are rated up to  8.5 AH with a 10 amp discharge and 7
> AH at 40 amp discharge.

> http://sanyo.wslogic.com/pdf/pdfs/HR-DU.pdf

> .......  Phil

How about you bother to check the datasheet that presented previously.  The
alkalines were comming in at over 20 Ah.

--
 JosephKK
 Gegen dummheit kampfen die Gotter Selbst, vergebens.??
  --Schiller



Wed, 06 Jan 2010 19:13:42 GMT
 D Cell battery current

"joseph2k  =  Criminal Pile of Stinking SHIT "

Quote:
> How about you bother to check the datasheet that presented previously.
> The
> alkalines were comming in at over 20 Ah.

**  Try  ACTUALLY   reading the  {*filter*}ING  thing   !!!!!!!!!!

 YOU  vile  slimy  pile  of  autistic,   psychotic

KIDDIE     ROOTING   EXCREMENT.

.......  Phil



Wed, 06 Jan 2010 20:05:19 GMT
 D Cell battery current

Quote:
> I have a Duracell D battery that has a voltage of 1.5V.  I am curious
> on how much current I can expect to draw from this batter.  Wikipedia
> shows that for a standard D cell alkaline battery the capacity is
> 20500 (mAh). Does this mean that each battery should be able to
> provide 20 A h?

> My system draws about 1A so it should run for 20 hours? Unfortunately
> the battery doesn't seem to be giving me back that much current and I
> was hoping if someone could explain what is going on.  In fact when I
> first power up my system there is a surger of current drawn and the D
> cells don't seem to handle that well.

> How can I figure how much current the D cell battery is rated to
> provided? I don't see anything on the packaging.

> If I need more current with the same batteries what should I do? Line
> them up in parallel? Will this double the current?

> Thanks for your thoughts.

> -Henk

The "capacity" is totally dependent upon the load current and the
voltage at which your system determine the battery to be "dead" at.
So the capacity of a cell is *not* the same at different load
currents.
Look at the data and graphs for an Alkaline D cell:
http://data.energizer.com/PDFs/E95.pdf

For a *constant current* of 1A, an Energizer D cell will last just
over 7 hours to 0.8V. If your device only works down to 1V per cell,
then that drops to 3 hours life.

Dave.



Wed, 06 Jan 2010 20:05:48 GMT
 
 [ 11 post ] 

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