better batteries

B

boombombap

Guest
is it me or are some batteries better than others?? It seems my digital
mavica works better with alkaline batteries than the regualr heavy duty
batteries. does this happen to anyone else?

thanks
boom boom bap
 
boombombap wrote:
is it me or are some batteries better than others?? It seems my digital
mavica works better with alkaline batteries than the regualr heavy duty
batteries. does this happen to anyone else?

thanks
boom boom bap
Alkaline cells tend to have much lower internal resistance than
regular (zinc carbon) cells, even though the actual energy rating may
not be much different. This lower resistance allows the cells to put
out large current pulses without the instantaneous voltage sagging so
far. Makes a big difference for loads like cameras that use current
in big gulps.

--
John Popelish
 
"Rich Grise" <rich@example.net> wrote in message

I picked up a NiMH charger and four 1900 mAH AA cells for about twenty
bucks at Fry's not too long ago. I also bought another pack of NiMH
AAs,
rated 2000 mAH.
Micro Center had a big bin full of those (with 4-2000mAH NiMH) for
US$4.73. How can they do that? The four batteries alone were worth
more than $4.73. I wish now that I had bought more of them.

The most notable thing about them is that they're the first batteries
I've
ever seen (or heard of, for that matter) that actually have their mAH
rating printed right on them.
I'd like to see all batteries marked this way. It would sure make
things easier.
 
Rich Grise wrote:

I picked up a NiMH charger and four 1900 mAH AA cells for about
twenty
bucks at Fry's not too long ago. I also bought another pack of NiMH
AAs,
rated 2000 mAH.

The most notable thing about them is that they're the first batteries
I've
ever seen (or heard of, for that matter) that actually have their mAH
rating printed right on them.
The best I have found, so far, are these 2300 mAH AA cells:
http://www.mahaenergy.com/store/Index.asp
I also have an MH-401 FS charger and am very happy with it.
--
John Popelish
 
<jpopelish@rica.net> wrote in message
news:1102780322.824476.87770@z14g2000cwz.googlegroups.com...

The most notable thing about them is that they're the first batteries
I've
ever seen (or heard of, for that matter) that actually have their mAH
rating printed right on them.

The best I have found, so far, are these 2300 mAH AA cells:
http://www.mahaenergy.com/store/Index.asp
I also have an MH-401 FS charger and am very happy with it.
--
John Popelish

The best in terms of capacity I've seen so far is 2500mAh for AA cells
(Energizer and iPowerUS), and 1000mAh for AAA cells (Accupower).

http://www.thomasdistributing.com/aa-nimh-batteries.htm#aarechargeablebatteries
 
"boombombap" <joekopasek@comcast.net> wrote in message
news:1102729978.665958.231350@f14g2000cwb.googlegroups.com...
is it me or are some batteries better than others?? It seems my digital
mavica works better with alkaline batteries than the regualr heavy duty
batteries. does this happen to anyone else?

thanks
boom boom bap

Alkaline batteries have dramatically higher capacity than so called "heavy
duty" batteries. Typically alkaline cells will have somewhere from 2.5 to 4
times the rated capacity of a similarly sized heavy duty cell. In a
practical application such as a digital camera, the drain rate is quite high
and thanks the to alkaline cell's much lower internal resistance, the actual
useful run time will be more (perhaps significantly) than 2.5 to 4 times
superior.

In high drain rate devices such as digital cameras though, a set of NiMH
batteries will typically provide significantly longer runtime than even the
alkaline cells. A typical AA alkaline cell (ex: Energizer) has a claimed
capacity rating of 2850mAh (but down to 0.8V/cell, much too low for most
equipment to continue functioning), but typical NiMH AA cells often have
around 2000mAh ratings (but drained only to around 1.0V per cell, which most
equipment still functions at). NiMH cells have much lower internal
resistance than the alkaline cells, and so the useful life in high drain
rate applications such as a digital camera will be noticeably superior. Run
time may be say around twice per charge or so compared to that of using
alkaline cells. The moral of the story is use NiMH cells in your digital
camera.

See also the very recent thread in sci.electronics.design titled "help on
batteries" by Pvt.Radar.
 
On Sat, 11 Dec 2004 00:48:19 -0700, Fritz Schlunder wrote:
"boombombap" <joekopasek@comcast.net> wrote in message
....
is it me or are some batteries better than others?? It seems my digital
mavica works better with alkaline batteries than the regualr heavy duty
batteries. does this happen to anyone else?
....
In high drain rate devices such as digital cameras though, a set of NiMH
batteries will typically provide significantly longer runtime than even
the alkaline cells. A typical AA alkaline cell (ex: Energizer) has a
claimed capacity rating of 2850mAh (but down to 0.8V/cell, much too low
for most equipment to continue functioning), but typical NiMH AA cells
often have around 2000mAh ratings (but drained only to around 1.0V per
cell, which most equipment still functions at). NiMH cells have much
lower internal resistance than the alkaline cells, and so the useful
life in high drain rate applications such as a digital camera will be
noticeably superior. Run time may be say around twice per charge or so
compared to that of using alkaline cells. The moral of the story is use
NiMH cells in your digital camera.
I picked up a NiMH charger and four 1900 mAH AA cells for about twenty
bucks at Fry's not too long ago. I also bought another pack of NiMH AAs,
rated 2000 mAH.

The most notable thing about them is that they're the first batteries I've
ever seen (or heard of, for that matter) that actually have their mAH
rating printed right on them.

Cheers!
Rich
 

Welcome to EDABoard.com

Sponsor

Back
Top