How long AA batteries last if one is not used?

Started Jun 29, 2005 | Discussions
zxcvar
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How long AA batteries last if one is not used?
Jun 29, 2005

Greetings! My camera is canon 510 which uses two AA or NiMh cells. Recently , I had an embarassing experience. All my batteries were out of juice. I forgot to charge them. I am thinking of keeping two ordinary AA batteries with my other batteries in case Murphy's rule strikes again. How long the ordinary AA batteris will last if I do not use them and keep them as spare to be used in emergency. With thanks.

Typeaux
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If alkaline AA batteries, a long time
In reply to zxcvar, Jun 29, 2005

I've used AA alkaline batteries that have sat in a drawer for two years without any problem. I routinely carry spares for my flash and my "walkaround" digital camera (my good digital doesn't accept AAs).

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Typeaux

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William R Sterling
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Re: How long AA batteries last if one is not used?
In reply to zxcvar, Jun 29, 2005

It depends a lot on the brand and chemistry.

NiMH batteries will lose about 3% of their power per day when they are allowed to just sit. They need to be charged regularly to keep them 'topped off' and ready for use. There is no penalty for 'topping off' NiMH batteries (as there is with Ni-Cad batteries).

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slipe
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About half
In reply to zxcvar, Jun 30, 2005

In a camera AA alkalines seem to take about half the pictures of a fully charged set of high capacity NiMH.

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Bob Blount
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Re: How long AA batteries last if one is not used?
In reply to William R Sterling, Jun 30, 2005

NiMH batteries lose 1% per day.

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William R Sterling
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Re: How long AA batteries last if one is not used?
In reply to Bob Blount, Jun 30, 2005

It depends on the chemistry ... the newer high capacity NiMH batteries can lose upwards of 3% per day. Temperature is also a big player, the higher the ambient temp the higher the self discharge.

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frank perry
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Re: If alkaline AA batteries, a long time
In reply to Typeaux, Jun 30, 2005

I purchased a pack of 4 "energiser" AA alkaline batteries the other day the "use by" date is 2011,I think for all practical purposes they will be ok for a few years.

Typeaux wrote:

I've used AA alkaline batteries that have sat in a drawer for two
years without any problem. I routinely carry spares for my flash
and my "walkaround" digital camera (my good digital doesn't accept
AAs).

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Typeaux

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Frank Perry

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jmgraumann
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Re: About half
In reply to slipe, Jun 30, 2005

Matches my experience with a Canon S1, and 2000mAh NimH compared to alkalines.

Just by the way, no matter what the battery manufacturer says and no matter how flashy/expensive your alkalines, alkalines are alkalines and all last the same time with a bit of give or take for manufacturing processes.

So, as long as you get the LR6 and not the R6(zinc metal, NOT alkaline) type, at any price, you're OK.

I always have a few packs lying around the house, you know for things like clocks and torches, and they will happily keep for a couple of years as long as you keep the contacts safe....
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digital_ray_of_light
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depends on model year, camera and manufacturer
In reply to slipe, Jun 30, 2005

The new generation of digital cameras are more energy efficient and can be last for more than just a few shots with with AA alkalines. However, with older cameras, you may not even get 10 shots with brand new AA alkalines. So the number varies depending on many factors, including the model year of the camera.

slipe wrote:

In a camera AA alkalines seem to take about half the pictures of a
fully charged set of high capacity NiMH.

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PicOne
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Read the package..
In reply to zxcvar, Jun 30, 2005

... that the AAs come in.. they usually have an expiration date.

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mrmagoo1962
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Re: How long AA batteries last if one is not used?
In reply to zxcvar, Jun 30, 2005

Good answers here to your question!

This link may be useful too:
http://www.batteryuniversity.com/index.htm

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ArchHunter
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Re: How long AA batteries last if one is not used?
In reply to Bob Blount, Jul 1, 2005

NIMH batteries will lose about 1% per day.

You may get a quick charger to charge batteries less than 1 hour.

In addition, batteries don't need to be fully charged to start being used.

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Hunter

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ArchHunter
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Re: About half
In reply to slipe, Jul 1, 2005

In a real life testing, rechargeable batteries can out run alkaline batteries by 70%.

Check- http://www.techchallenge.com battery testing section.

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Hunter

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