How does temperature affect batteries?

This article explains how temperature affects battery performance and some precautions for hot and cold climates.

At higher temperatures, the battery capacity will increase, while at lower temperatures, battery capacity will decrease. While this may seem advantageous for climates with higher temperatures, the lifespan of a battery will actually decrease the higher the temperature the battery is exposed to overtime. A rough estimate is that for every increase in temperature of 18ºF (10ºC), the battery lifespan will be halved.

Referring to the manufacturer's battery specification sheet will provide additional information on the estimated lifespan using a combination of temperature and cycle count graphs.