Does freezing batteries really make them last longer?

Question

Or is this an urban legend?

Answer 1

Alkaline batteries stored at "room temperature" self discharge at a rate of less than two percent per year. So normally refrigerating or freezing them will only help maintain their charge by a tiny amount. Hardly worth the effort of chilling them. However, if alkaline batteries are stored at higher temperatures they will start to lose capacity much quicker. At 85 degrees F they only lose about 5% per year, but at 100 degrees they lose 25% per year. So if you live in a very hot climate or are storing your batteries in a very hot location, it may be worthwhile for you to store your alkaline batteries in a refrigerator instead.

NiMH and NiCd batteries self discharge at a MUCH faster rate than alkaline batteries. In fact, at "room temperature" (about 70 degrees F) NiMH and NiCD batteries will self discharge a few percent PER DAY. Storing them at lower temperatures will slow their self discharge rate dramatically. NiMH batteries stored at freezing will retain over 90% of their charge for full month. So it might make sense to store them in a freezer. If you do, it's best to bring them back to room temperature before using them. Even if you don't freeze your NiMH batteries after charging them, you should store them in a cool place to minimize their self discharge.

Answer 2

kfaulk has it right.

And then to add to his, if you store the battery near another largely electrical circuit, like something as small as a car battery or as large as an electrical generator for generating power for the whole house and not just an addition outlet or two ( the difference between several thousand dollars at the local home depot) the battery in "storage" can actually leak out much faster, one might even be able to say the larger electric facilities drained the power overnight.

For example, a normal everyday flashlight stored in the glove compartment of your vehicle can loose charge after less than a month when never used, because the vehicles battery under the hood caused a faster leak out.

And then there is the idea of the battery actually grounding against the ...umm...ahem...ground. Always store any battery atleast 6 inches off the ground.

Answer 3

It's an old wives' tale. My grandma used to do it when she was alive. It doesn't make them last any longer. She also used to refridgerate them after giving up on the freezer method. Neither one made the batteries last any longer. ALL batteries have a used by date on them now so it doesn't matter. How often you use the battery operated item is how long they'll last. The more, the less the battery life. The less, the longer.

Answer 4

It's an urban legend in my mind...besides...I haven't ever seen anyone freeze them but I have seen them put them in the refrigerator and it seems to suck the life out of them to me.

Answer 5

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Answer 6

Man i always wondered the same thing and like the person ahead of me my mom and grandparents always did and i never saw much more life out of an eveready.

Answer 7

1

Answer 8

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Answer 9

Not freezing them...Just keep them in the fridge

Answer 10

Refrigerating STANDARD "flashlight" batteries does work,but not alkaline or Lithum.