Does the temperature of a battery effect how long it will last?

Answer 1

My grandmother keeps all of her batteries in her freezer, and they seem to last longer than room-temperature ones. Hope this helped! (I think it has to do with slowing down the corrosion in the interior of the battery)

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Actually storage in the freezer damages them and shortens their life (due to ice crystal growth).

Perhaps you meant the refrigerator. That extends the life of batteries in storage, but before using them batteries must be allowed to warm back to room temperature or they will be weak.

Answer 2

Depends on what you mean.

Storing a battery at a lower temperature will help it keep "fresh" longer. There will be more of the original capacity left in the battery when you begin to use it.

If you store it warm, or at high temperature, more of the capacity will "leak" out before you start to use it.

Do note that this is a fairly slow process. You won't notice any difference in remaining capacity over a week or two.

While in use, a cold battery will have less capacity than a slightly warm one.