D-Cell mAh: lithium vs NiMH vs regular alkaline
 

Questions.

1. I've found online a NiMH D-Cell boasting 11,000 mAh for $9. Can that be
true?

2. The few Li-ion in D-Cell config I've found have pathetic milli amp hours.
Are there any that will last a long time in something like, oh, a baby swing
and/or flashlite?

3. I know that the unused shelf-life of NiMH and cads are pretty bad. But
what of the lithiums? This is important because I'm interested in
flashlight usages too.

Are there any good pointers to D-Cell rechargables (not the old zincs or
lead-acid's)?

Inteded uses:

Baby swing
Flashlights
Radio

4. I know that a regular D-cell (and others) are 1.5 V. Is there a "under
load" consideration that changes specifications for that? What are the amps
of such things. I understand the concepts of volts, amps, amphours, etc.,
but do not understand them as they relate to batteries. Furthermore I've
read that the rechargables typically don't quite reach the 1.5 voltage.


Thanks!

--
Everythinginlifeisrealative.Apingpongballseemssmal luntilsomeoneramsitupyournose.

The largest chargeable battery I have seen in a "D" cell was a rating of
4,000 mAh. This would be 4 Ah. This battery type was an industrial rated
battery primarily for running portable lighting equipment, and
communications equipment. The standard "D" cells that I see are rated at
2,000 mAh. Maybe the battery you saw is really rated at 1,100 mAh, and
they made a printing error?

Take note that most of these chargeable batteries are rated at 1.25 to
1.35 Volts. They are not usually rated at 1.5 Volts. If you are building
a pack to run 12 Volt equipment it would be best to use 10 of these
battery types in series. We have also built packs with 16 of these
batteries in series and put an efficient high current capacity voltage
regulator on its output to regulate the output voltage down to 12.5
Volts. Some customers asked for 13.8 Volts to be equivalent to the same
voltage that can come from the average automobile.

If you want to have more current, you can make up combinations of series
and parallel configurations with these batteries. If we put three sets
in parallel in order to have three times the current capacity. When this
is done, then portability becomes another issue.

The rating of 11,000 mAh for a single "D" cell sounds very high, or this
is battery type I have not seen yet!

--

Jerry G.
======

"Thomas G. Marshall"
. com wrote in message
news:u8f9d.3534$4b.2817@trndny09...

Questions.

1. I've found online a NiMH D-Cell boasting 11,000 mAh for $9. Can that
be
true?

2. The few Li-ion in D-Cell config I've found have pathetic milli amp
hours.
Are there any that will last a long time in something like, oh, a baby
swing
and/or flashlite?

3. I know that the unused shelf-life of NiMH and cads are pretty bad.
But
what of the lithiums? This is important because I'm interested in
flashlight usages too.

Are there any good pointers to D-Cell rechargables (not the old zincs or
lead-acid's)?

Inteded uses:

Baby swing
Flashlights
Radio

4. I know that a regular D-cell (and others) are 1.5 V. Is there a
"under
load" consideration that changes specifications for that? What are the
amps
of such things. I understand the concepts of volts, amps, amphours,
etc.,
but do not understand them as they relate to batteries. Furthermore
I've
read that the rechargables typically don't quite reach the 1.5 voltage.


Thanks!

--
Everythinginlifeisrealative.Apingpongballseemssmal luntilsomeoneramsitupy
ournose.

Jerry G. coughed up:
The largest chargeable battery I have seen in a "D" cell was a rating
of 4,000 mAh. This would be 4 Ah. This battery type was an industrial
rated battery primarily for running portable lighting equipment, and
communications equipment. The standard "D" cells that I see are rated
at 2,000 mAh. Maybe the battery you saw is really rated at 1,100 mAh,
and they made a printing error?

Take note that most of these chargeable batteries are rated at 1.25 to
1.35 Volts. They are not usually rated at 1.5 Volts. If you are
building a pack to run 12 Volt equipment it would be best to use 10
of these battery types in series. We have also built packs with 16 of
these batteries in series and put an efficient high current capacity
voltage regulator on its output to regulate the output voltage down
to 12.5 Volts. Some customers asked for 13.8 Volts to be equivalent
to the same voltage that can come from the average automobile.

If you want to have more current, you can make up combinations of
series and parallel configurations with these batteries. If we put
three sets in parallel in order to have three times the current
capacity. When this is done, then portability becomes another issue.

The rating of 11,000 mAh for a single "D" cell sounds very high, or
this is battery type I have not seen yet!



http://www.zbattery.com/mh-2d110.html
http://michaelbluejay.com/batteries/
http://thomas-distributing.com/mh-2d110.htm (same as first battery)

The following has them up to 9000mAh, but over 10x the cost of the others!
http://www.megabatteries.com/items.asp?cat_id=63





--
It'salwaysbeenmygoalinlifetocreateasignaturethaten dedwiththeword"blarphoogy".

"Thomas G. Marshall" . com wrote in message news:u8f9d.3534$4b.2817@trndny09...
Questions.

1. I've found online a NiMH D-Cell boasting 11,000 mAh for $9. Can that be
true?

2. The few Li-ion in D-Cell config I've found have pathetic milli amp hours.
Are there any that will last a long time in something like, oh, a baby swing
and/or flashlite?

3. I know that the unused shelf-life of NiMH and cads are pretty bad. But
what of the lithiums? This is important because I'm interested in
flashlight usages too.

Are there any good pointers to D-Cell rechargables (not the old zincs or
lead-acid's)?

Inteded uses:

Baby swing
Flashlights
Radio

4. I know that a regular D-cell (and others) are 1.5 V. Is there a "under
load" consideration that changes specifications for that? What are the amps
of such things. I understand the concepts of volts, amps, amphours, etc.,
but do not understand them as they relate to batteries. Furthermore I've
read that the rechargables typically don't quite reach the 1.5 voltage.


Thanks!

I haven't seen any 11,000 mAh NiMh batteries, but I have seen
8,000 mAh 'D' cells for 9 or 10 dollars.

A standard 'D' alkaline cell will be about 16,000 mAh and
has a long shelf life. Alkalines are probably better for
the radio if you don't play it all day long. Same goes
for the flashlight if you don't use it much.

I hear recharable Lithium cells have a very long shelf life
(charged) but they may blow up if overcharged. I think the
capacity is about the same as ni-cads.

-Bill

Live and learn! I have never seen a "D" battery at 11,000 mAh.

The largest that the suppliers I deal with can supply is at 4,000 mAh.

Jerry G.
========


(Bill Bowden) wrote in message . com...
"Thomas G. Marshall" . com wrote in message news:u8f9d.3534$4b.2817@trndny09...
Questions.

1. I've found online a NiMH D-Cell boasting 11,000 mAh for $9. Can that be
true?

2. The few Li-ion in D-Cell config I've found have pathetic milli amp hours.
Are there any that will last a long time in something like, oh, a baby swing
and/or flashlite?

3. I know that the unused shelf-life of NiMH and cads are pretty bad. But
what of the lithiums? This is important because I'm interested in
flashlight usages too.

Are there any good pointers to D-Cell rechargables (not the old zincs or
lead-acid's)?

Inteded uses:

Baby swing
Flashlights
Radio

4. I know that a regular D-cell (and others) are 1.5 V. Is there a "under
load" consideration that changes specifications for that? What are the amps
of such things. I understand the concepts of volts, amps, amphours, etc.,
but do not understand them as they relate to batteries. Furthermore I've
read that the rechargables typically don't quite reach the 1.5 voltage.


Thanks!

I haven't seen any 11,000 mAh NiMh batteries, but I have seen
8,000 mAh 'D' cells for 9 or 10 dollars.

A standard 'D' alkaline cell will be about 16,000 mAh and
has a long shelf life. Alkalines are probably better for
the radio if you don't play it all day long. Same goes
for the flashlight if you don't use it much.

I hear recharable Lithium cells have a very long shelf life
(charged) but they may blow up if overcharged. I think the
capacity is about the same as ni-cads.

-Bill

Jerry Greenberg coughed up:
Live and learn! I have never seen a "D" battery at 11,000 mAh.

The largest that the suppliers I deal with can supply is at 4,000 mAh.

Jerry G.
========


1. Please, if you want to top post, I don't have a real issue with it as
long as others in your quote havn't bottom posted already. Throwing a top
post on top of a buch of bottom posts makes a huge MESS.

2. Did you see the links to the 11,000 mAh's I posted earlier?



--
"His name was Robert Paulson. His name was Robert Paulson. His name was
Robert Paulson..."

Bill Bowden coughed up:

....[thwack]...


I haven't seen any 11,000 mAh NiMh batteries, but I have seen
8,000 mAh 'D' cells for 9 or 10 dollars.

A standard 'D' alkaline cell will be about 16,000 mAh


Ah ha, thanks! Are they all about the same?

My informal tests between energizer (not e^2) and duracell in the gym
powering my old sony walkman (an excellent low power consumption tape player
by the way) showed me running for OVER A MONTH of EVERY DAY of OVER AN HOUR
A DAY on 2 AA's. No, I am /not/ kidding. Please don't send the cookie
truck, I am not crazy either. :) The duracells gacked after a week or so.

I asked a duracell spokesman about this and he said that it's possible: the
unadvertised skinny within their (duracell) company is that duracells last
longer on multiple very short term usages than energizer, and that energizer
lasts longer for sustained durations.

HUH? What have you guys found?

....[rip]...


--
"His name was Robert Paulson. His name was Robert Paulson. His name was
Robert Paulson..."

"Jerry G." wrote in message
...
The largest chargeable battery I have seen in a "D" cell was a rating
of
4,000 mAh. This would be 4 Ah. This battery type was an industrial
rated
battery primarily for running portable lighting equipment, and
communications equipment. The standard "D" cells that I see are rated
at
2,000 mAh. Maybe the battery you saw is really rated at 1,100 mAh, and
they made a printing error?

At http://www.cheapbatteries.com/nimh.htm you will see 7000 and 8000 mAh
rechargeable D cells.

[snip]

The rating of 11,000 mAh for a single "D" cell sounds very high, or
this
is battery type I have not seen yet!

I would say that 11,000 isn't unheard of.

--

Jerry G.
======

"Thomas G. Marshall"
. com wrote in
message
news:u8f9d.3534$4b.2817@trndny09...

Questions.

1. I've found online a NiMH D-Cell boasting 11,000 mAh for $9. Can
that
be
true?

2. The few Li-ion in D-Cell config I've found have pathetic milli amp
hours.
Are there any that will last a long time in something like, oh, a baby
swing
and/or flashlite?

3. I know that the unused shelf-life of NiMH and cads are pretty bad.
But
what of the lithiums? This is important because I'm interested in
flashlight usages too.

Are there any good pointers to D-Cell rechargables (not the old zincs
or
lead-acid's)?

Inteded uses:

Baby swing
Flashlights
Radio

4. I know that a regular D-cell (and others) are 1.5 V. Is there a
"under
load" consideration that changes specifications for that? What are
the
amps
of such things. I understand the concepts of volts, amps, amphours,
etc.,
but do not understand them as they relate to batteries. Furthermore
I've
read that the rechargables typically don't quite reach the 1.5
voltage.


Thanks!