Why Your iPhone Battery Dies Faster in the Cold

Understanding the science behind battery drain in freezing temperatures—and smart tips to keep your device powered in winter.

Ever reached for your iPhone on a frigid day and watched the battery percentage nosedive? You’re not alone. Cold weather is one of the harshest challenges for your phone’s battery, and the reasons why run deeper than you might think. Beneath the sleek glass and metal, your iPhone is powered by chemistry that simply doesn’t like the cold.

Most smartphones today—including every iPhone—use lithium-ion batteries. These batteries are lightweight and powerful for their size, but the Achilles’ heel is temperature sensitivity. If you find your battery life plummeting during the winter months, understanding the science can help you protect your device and stay connected, no matter the chill.

Let’s unpack what’s happening inside your iPhone when temperatures drop—and walk through practical ways to keep your battery at its best all season long.

The Science Behind a Cold Battery