D-Cell mAh: lithium vs NiMH vs regular alkaline

[Thomas G. Marshall]

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.Apingpongballseemssmalluntilsomeoneramsitupyournose.

 

[Thomas G. Marshall]

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..."

 

[Watson A.Name - \"Watt Su]

"Jerry G." <jerryg50@hotmail.com> wrote in message
news:2snh67F1mucnpU2@uni-berlin.de...

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"
tgm2tothe10thpower@replacetextwithnumber.hotmail.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!

 

[Thomas G. Marshall]

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..."