Of course, assuming you wrap it in a tight plastic bag to avoid humidity.
I have a laptop battery at my office that's not currently in use, and also won't be used at least for the next several months. I know that Lithium-ion batteries degrade faster at higher temperatures.
And if this image (kindly stolen from a Lifehacker article) is to be believed, even at room temperature (25C, 77F) the estimated loss is around twice the loss at 0C (32F).
In the last couple of weeks, the temperature here at the office has been approaching the 36C (100F) and rising. So it occurred to me it might be better to store it in the freezer (or perhaps the refrigerator) to slow the aging effect. Is that correct and safe?