Yes, alkaline batteries can freeze if left in the freezer for an extended period. Alkaline batteries contain a liquid electrolyte that can freeze at low temperatures. When the battery freezes, the chemical reactions inside may slow down or even stop entirely, reducing its ability to deliver power.
The freezing point of the electrolyte in alkaline batteries is typically around -20°C (-4°F) or lower, depending on the specific battery brand and chemistry. If you live in a region with very cold winters or store batteries in an unheated space, it's possible that the temperature could drop below the freezing point of the battery's electrolyte.
When an alkaline battery freezes, it can potentially cause the casing to crack or leak, leading to damage or malfunction of the battery. Once the battery thaws, the liquid electrolyte may not return to its original state, causing irreversible damage.
To prolong the life and performance of alkaline batteries, it's best to store them at room temperature (around 20-25°C or 68-77°F) in a dry environment. Avoid exposing them to extreme heat or cold, as this can affect their performance and lifespan. If you need to use batteries in cold conditions, consider keeping them warm (e.g., in your pocket) until you're ready to use them to maintain their functionality.