How long AA batteries last if one is not used?
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.
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).
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).
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.
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.
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).-- hide signature --
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....
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.
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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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.