Hi capacity rechargeable AA Batteries?

B

Bill Bowden

Guest
I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill
 
On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
<bperryb@bowdenshobbycircuits.info> wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.
Click to expand...
How are you charging them? If it's with the cells in series (common with
many in-system and low cost chargers) then you might have one cell that
had a much lower initial charge state than the rest. That one will never
quite fully charge and so will deplete much sooner than its rated
capacity.

--
Rich Webb Norfolk, VA
 
On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
<bperryb@bowdenshobbycircuits.info> wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill
Click to expand...
Try these:

http://www.fdk.com/battery/nimh_e/tech_info/HR-AAU.pdf

http://data.energizer.com/PDFs/nh15-2300.pdf

There's another one around, a Maha 2700mAh NiMH but data sheets seem
to be unobtainium.

---
JF
 
In article
<8d466772-60ff-4580-b2f8-f4ef4cc898b1@b13g2000prf.googlegroups.com>,
Bill Bowden <bperryb@bowdenshobbycircuits.info> wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.
Click to expand...
For all that I buy things from *b*y myself, I would hardly be surprised
if the batteries were seconds, takeouts, old stock or the like. Some
things are perhaps better bought from a real store.

I have had fairly good results with Lenmar NiMh batteries and their 8/15
minute smart charger (only throws on about 80% in that time, but still
far better than 8-16 hour chargers, or dumb ones.) Bought a brick of 20
2500 mAh in 2007, have 12 that still work and 8 that are dead now. The
pair of 2000 mah fast charge they threw in (the 8 min in the charger
thing) also still work fine.

Of course, if your camera is not really set up to use NiMh effectively
(ie, still built around the assumption that it will be fed alkalines)
the fact that they start at 1.2 not 1.5 V may mean that it will crap out
long before the battery is actually discharged, so it may not be a fair
measure of capacity.

--
Cats, coffee, chocolate...vices to live by
 
On Wed, 16 Mar 2011 09:59:57 -0400, Ecnerwal wrote:

In article
8d466772-60ff-4580-b2f8-f4ef4cc898b1@b13g2000prf.googlegroups.com>,
Bill Bowden <bperryb@bowdenshobbycircuits.info> wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought a
set of 4 advertised at 2500 maH, but turned out to be only about 400maH
at a 330 mA load in my digital camera. The batteries powered the camera
snip
Of course, if your camera is not really set up to use NiMh effectively
(ie, still built around the assumption that it will be fed alkalines)
the fact that they start at 1.2 not 1.5 V may mean that it will crap out
long before the battery is actually discharged, so it may not be a fair
measure of capacity.
Click to expand...
Good design practice for NiCd, NiMH, and dry cells is to design for
discharge down to 0.9V or 1V per cell. Anything more would be lazy.

Oh wait -- consumer equipment. Good design practice.

Never mind.

--
http://www.wescottdesign.com
 
On Tue, 15 Mar 2011 22:41:03 -0700, Bill Bowden wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought a
set of 4 advertised at 2500 maH, but turned out to be only about 400maH
at a 330 mA load in my digital camera. The batteries powered the camera
for about 1.2 hours at 330mA in the slide show mode, which amounted to
only 0.330 * 1.2 = 396 maH.
Click to expand...
They probably are some 15 years old AA rebranded. I wouldn't be surprised
at all if they were 10 years old AAA repackaged. Someone did this with
capacitors, transistors and other components.

Here are some examples.
http://goo.gl/vdEKF

If you buy cheap chinese cells, avoid BTY at any cost: they're not
necessarily fake but their current values are blatant lies.

What name brand batteries are best for high capacity?
Click to expand...
I was never disappointed by Energizer cells.
 
On 16/03/2011 3:41 PM, Bill Bowden wrote:
I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill
Click to expand...
I have had very good results with SoShine (genuine capacity, I have
about 30 in different sizes some have done up to 400 cycles and I have
had no failures - from deal extreme) and not so good results with Maxus
(about 50% capacity), Ultrafire and Truefire (50% - 70%). ASDF makes a
comment about BTY batteries. I couldn't agree more.

"Battery Thought You" are worthless. I bought 8 of the most economical
"great for OEM" line. A couple leaked during their first charge, about
1/2 wouldn't charge at all and none of them had more than 10% of the
advertised capacity. I'm not exaggerating - absolutely worthless. After
charging they all went straight into the trash. I suspect they are just
a way to export toxic waste.
 
On Mar 16, 10:52 am, asdf <a...@nospam.com> wrote:
On Tue, 15 Mar 2011 22:41:03 -0700, Bill Bowden wrote:
I see numerous offers for rechargeable AA batteries on Ebay. I bought a
set of 4 advertised at 2500 maH, but turned out to be only about 400maH
at a 330 mA load in my digital camera. The batteries powered the camera
for about 1.2 hours at 330mA in the slide show mode, which amounted to
only 0.330 * 1.2 = 396 maH.

They probably are some 15 years old AA rebranded. I wouldn't be surprised
at all if they were 10 years old AAA repackaged. Someone did this with
capacitors, transistors and other components.

Here are some examples.http://goo.gl/vdEKF

If you buy cheap chinese cells, avoid BTY at any cost: they're not
necessarily fake but their current values are blatant lies.
Click to expand...
That's what I bought (BTY) but the price was right. Got 4 for 63
cents. Thought about leaving negative feedback, but since the price
was fair, I didn't leave any feedback.

-Bill

What name brand batteries are best for high capacity?

I was never disappointed by Energizer cells.
Click to expand...
 
On Mar 16, 4:06 am, John Fields <jfie...@austininstruments.com> wrote:
On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden

bper...@bowdenshobbycircuits.info> wrote:
I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill

Try these:

http://www.fdk.com/battery/nimh_e/tech_info/HR-AAU.pdf

http://data.energizer.com/PDFs/nh15-2300.pdf

There's another one around, a Maha 2700mAh NiMH but data sheets seem
to be unobtainium.

---
JF
Click to expand...
Yes, the 2300maH energizer looks good. Digikey has them at $4.40 each.
Part number N703-ND.

-Bill
 
Op 3/16/2011 6:41 AM, Bill Bowden schreef:
I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?
Click to expand...
Bateries get there full caacity afer 5 charge/discharge cycles.

--
pim.
 
On Wed, 16 Mar 2011 07:06:50 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
bperryb@bowdenshobbycircuits.info> wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill

Try these:

http://www.fdk.com/battery/nimh_e/tech_info/HR-AAU.pdf

http://data.energizer.com/PDFs/nh15-2300.pdf

There's another one around, a Maha 2700mAh NiMH but data sheets seem
to be unobtainium.
Click to expand...
---
Wrong...

I emailed them and got this back:

news:khj2o61f7vg1pqhjs3e1uuncf6s8tfn2al@4ax.com


Not shabby...

---
JF
 
On Sun, 20 Mar 2011 09:37:11 -0500, John Fields <jfields@austininstruments.com> wrote:

On Wed, 16 Mar 2011 07:06:50 -0500, John Fields
jfields@austininstruments.com> wrote:

On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
bperryb@bowdenshobbycircuits.info> wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill

Try these:

http://www.fdk.com/battery/nimh_e/tech_info/HR-AAU.pdf

http://data.energizer.com/PDFs/nh15-2300.pdf

There's another one around, a Maha 2700mAh NiMH but data sheets seem
to be unobtainium.

---
Wrong...

I emailed them and got this back:

news:khj2o61f7vg1pqhjs3e1uuncf6s8tfn2al@4ax.com


Not shabby...
Click to expand...
I bought a set of four Maha batteries, they do not perform to spec, nowhere
near claimed capacity, and I was using their fancy charger. No joy.

Grant.
---
JF
Click to expand...
 
On Mar 16, 3:40 pm, Bill Bowden <bper...@bowdenshobbycircuits.info>
wrote:
On Mar 16, 10:52 am, asdf <a...@nospam.com> wrote:



On Tue, 15 Mar 2011 22:41:03 -0700, Bill Bowden wrote:
I see numerous offers for rechargeable AA batteries on Ebay. I bought a
set of 4 advertised at 2500 maH, but turned out to be only about 400maH
at a 330 mA load in my digital camera. The batteries powered the camera
for about 1.2 hours at 330mA in the slide show mode, which amounted to
only 0.330 * 1.2 = 396 maH.

They probably are some 15 years old AA rebranded. I wouldn't be surprised
at all if they were 10 years old AAA repackaged. Someone did this with
capacitors, transistors and other components.

Here are some examples.http://goo.gl/vdEKF

If you buy cheap chinese cells, avoid BTY at any cost: they're not
necessarily fake but their current values are blatant lies.

That's what I bought (BTY) but the price was right. Got 4 for 63
cents. Thought about leaving negative feedback, but since the price
was fair, I didn't leave any feedback.
Click to expand...
I just got a message from ebay requesting response to a survey about
the recent (BTY) battery purchase. They wanted to know how I rated the
sellor on a scale of 1-10, and my thoughts about the transaction, and
if I would buy anything from the sellor again. I gave him a 5 and
explained the batteries were worth the low price and I would buy from
him again, but probably not BTY batteries. I didn't want to leave
negative feedback, since the guy probably doesn't know what he is
selling.

-Bill
 
On 03/16/2011 06:41 AM, Bill Bowden wrote:
I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?
Click to expand...
I bought 2650 mA Duracell and when they started to get excessive self
discharge I bought low self discharge (LSD) rechargeables (Sanyo eneloop
HR3-UTGA). I'll rather have 1900 mAh "1500 times" than 2650 mAh
"hundreds of times".

Bernhard
 
Bill Bowden wrote:

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

I'd spring for alkalines before I'd buy rechargeables on ebay.
Click to expand...

Cheers!
Rich
 
On Mar 22, 1:02 pm, Rich Grise <ri...@example.net.invalid> wrote:
Bill Bowden wrote:
I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

I'd spring for alkalines before I'd buy rechargeables on ebay.

Cheers!
Rich
Click to expand...
I've tried alkalines, and they don't last long for the limited use.
Digital cameras need rechargeables, even if low capacity. I think the
trick to buying anything on ebay is to notice the number of bids, and
avoid stuff that nobody bids on.

-Bill
 
On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
<bperryb@bowdenshobbycircuits.info> wrote as underneath my scribble :

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill
Click to expand...
Just a thaught - I found that the very high capacity NiMh rech. cells also
have a really high self discharge rate which in my case made them far less
useful than the normal (say 1300mAh) cells. AA Energiser 2500 were the
worst I came across, hero to zero in about two weeks from memory - it was a
couple of years ago, I binned them!. I found the Hybrio type cells a far
more useful compromise despite the highter cost to buy, you cant get them in
such high claimed capacity but you can get just over 2200 in Hybrio type
cells and they are good, allow heavy discharge rates and self discharge at a
very low rate when at rest. I baught 100 on Ebay, the label was EXTREME -
made in unspecified, probably China! - no complaints!
Charlie+
 
On Thu, 24 Mar 2011, Charlie+ wrote:

On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
bperryb@bowdenshobbycircuits.info> wrote as underneath my scribble :

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill

Just a thaught - I found that the very high capacity NiMh rech. cells also
have a really high self discharge rate which in my case made them far less
useful than the normal (say 1300mAh) cells. AA Energiser 2500 were the
worst I came across, hero to zero in about two weeks from memory - it was a
couple of years ago, I binned them!. I found the Hybrio type cells a far
more useful compromise despite the highter cost to buy, you cant get them in
such high claimed capacity but you can get just over 2200 in Hybrio type
cells and they are good, allow heavy discharge rates and self discharge at a
very low rate when at rest. I baught 100 on Ebay, the label was EXTREME -
made in unspecified, probably China! - no complaints!
Charlie+

I'm not sure.
Click to expand...

I bought a set of 8 Duracell 2650maH nimh's, needing six for a shortwave
radio. And they never seemed to have voltage when I needed them. I'd
charge them, and either the radio would soon stop working, or I'd charge
them and leave the radio unused, and they'd not be useable when I went to
use the radio.

But then I measured the voltage after one charge (in a quickcharger) and
the voltage was lower than I expected. Joined with the likelihood that
the radio has some cutoff that isn't intended for non-alkaline batteries,
and it's not really a surprise.

So when the light indicating charge came on in the quickcharger, I'd just
unplug it and run it again, and doing that a few times (I'm not sure if a
few were actually needed, I simply haven't checked) seemed to fix the
problem. I'm getting much longer use out of those batteries and they
don't immediately self-discharge if I don't use the radio.

The quickcharger seemed to be fine with lower current batteries, making me
wonder if it's just not prepared for the higher capacity ones. But then I
remember, I've also noticed the problem with some AAAs in the same
charger. So perhaps the charger isn't as good as it should be.

Michael
 
"Michael Black" <et472@ncf.ca> wrote in message
news:pine.LNX.4.64.1103241607310.20342@darkstar.example.net...
On Thu, 24 Mar 2011, Charlie+ wrote:

On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
bperryb@bowdenshobbycircuits.info> wrote as underneath my scribble :

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill

Just a thaught - I found that the very high capacity NiMh rech. cells
also
have a really high self discharge rate which in my case made them far
less
useful than the normal (say 1300mAh) cells. AA Energiser 2500 were the
worst I came across, hero to zero in about two weeks from memory - it was
a
couple of years ago, I binned them!. I found the Hybrio type cells a far
more useful compromise despite the highter cost to buy, you cant get them
in
such high claimed capacity but you can get just over 2200 in Hybrio type
cells and they are good, allow heavy discharge rates and self discharge
at a
very low rate when at rest. I baught 100 on Ebay, the label was
EXTREME -
made in unspecified, probably China! - no complaints!
Charlie+

I'm not sure.

I bought a set of 8 Duracell 2650maH nimh's, needing six for a shortwave
radio. And they never seemed to have voltage when I needed them. I'd
charge them, and either the radio would soon stop working, or I'd charge
them and leave the radio unused, and they'd not be useable when I went to
use the radio.

But then I measured the voltage after one charge (in a quickcharger) and
the voltage was lower than I expected. Joined with the likelihood that
the radio has some cutoff that isn't intended for non-alkaline batteries,
and it's not really a surprise.

So when the light indicating charge came on in the quickcharger, I'd just
unplug it and run it again, and doing that a few times (I'm not sure if a
few were actually needed, I simply haven't checked) seemed to fix the
problem. I'm getting much longer use out of those batteries and they
don't immediately self-discharge if I don't use the radio.

The quickcharger seemed to be fine with lower current batteries, making me
wonder if it's just not prepared for the higher capacity ones. But then I
remember, I've also noticed the problem with some AAAs in the same
charger. So perhaps the charger isn't as good as it should be.

Michael
Click to expand...
Try these Sanyo batteries. They don't self discharge like most of the
others.
http://www.eneloop.info/

Larry
 
On Fri, 25 Mar 2011 07:38:19 +1000, "Larry" <reply@group.com> wrote as
underneath my scribble :

"Michael Black" <et472@ncf.ca> wrote in message
news:pine.LNX.4.64.1103241607310.20342@darkstar.example.net...
On Thu, 24 Mar 2011, Charlie+ wrote:

On Tue, 15 Mar 2011 22:41:03 -0700 (PDT), Bill Bowden
bperryb@bowdenshobbycircuits.info> wrote as underneath my scribble :

I see numerous offers for rechargeable AA batteries on Ebay. I bought
a set of 4 advertised at 2500 maH, but turned out to be only about
400maH at a 330 mA load in my digital camera. The batteries powered
the camera for about 1.2 hours at 330mA in the slide show mode, which
amounted to only 0.330 * 1.2 = 396 maH.

What name brand batteries are best for high capacity?

-Bill

Just a thaught - I found that the very high capacity NiMh rech. cells
also
have a really high self discharge rate which in my case made them far
less
useful than the normal (say 1300mAh) cells. AA Energiser 2500 were the
worst I came across, hero to zero in about two weeks from memory - it was
a
couple of years ago, I binned them!. I found the Hybrio type cells a far
more useful compromise despite the highter cost to buy, you cant get them
in
such high claimed capacity but you can get just over 2200 in Hybrio type
cells and they are good, allow heavy discharge rates and self discharge
at a
very low rate when at rest. I baught 100 on Ebay, the label was
EXTREME -
made in unspecified, probably China! - no complaints!
Charlie+

I'm not sure.

I bought a set of 8 Duracell 2650maH nimh's, needing six for a shortwave
radio. And they never seemed to have voltage when I needed them. I'd
charge them, and either the radio would soon stop working, or I'd charge
them and leave the radio unused, and they'd not be useable when I went to
use the radio.

But then I measured the voltage after one charge (in a quickcharger) and
the voltage was lower than I expected. Joined with the likelihood that
the radio has some cutoff that isn't intended for non-alkaline batteries,
and it's not really a surprise.

So when the light indicating charge came on in the quickcharger, I'd just
unplug it and run it again, and doing that a few times (I'm not sure if a
few were actually needed, I simply haven't checked) seemed to fix the
problem. I'm getting much longer use out of those batteries and they
don't immediately self-discharge if I don't use the radio.

The quickcharger seemed to be fine with lower current batteries, making me
wonder if it's just not prepared for the higher capacity ones. But then I
remember, I've also noticed the problem with some AAAs in the same
charger. So perhaps the charger isn't as good as it should be.

Michael


Try these Sanyo batteries. They don't self discharge like most of the
others.
http://www.eneloop.info/

Larry
Eneloop = Same technology as Hybrio above just different manufacturer.
Click to expand...
Duracell have another version - cant remember what called but you can always
spot them by their stonking great price in retail shops! These type of
cells always come precharged whatever they are called so if they say they
must be charged before use then they are the old technology.
C+
 
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