Lithium batteries thrive in environments similar to humans, as they prefer moderate temperatures. To ensure optimal performance and longevity it's important that you avoid storing them in extremely hot or cold areas such as a garage with extreme temperature fluctuations throughout the day; basements are generally an ideal place for lithium batteries since these spaces maintain steadier temps between 60F-90F degrees Fahrenheit. A battery can still be utilized when below 32° F but should not require charging until above 32° F.