If you’ve ever tossed your Dewalt 20V battery in a cold garage or shed during winter, you might be unknowingly cutting its lifespan short. Lithium-ion batteries, like those used in Dewalt’s 20V line, don’t handle extreme temperatures well—especially the cold.

Temperatures below freezing can slow down the chemical reactions inside the battery, causing it to charge more slowly, hold less power, or even stop working temporarily. In worst cases, repeatedly exposing the battery to freezing temperatures can cause permanent internal damage. That means less runtime, more charging cycles, and a higher chance you'll need a replacement sooner than expected.

DeWalt does offer some level of protection through its battery design, but it doesn’t make them bulletproof. If you're storing your tools and batteries in a cold environment, consider bringing the batteries inside to room temperature. It’s a simple move that could save you money and frustration.

Tip: Always let a cold Dewalt 20V battery warm up before charging. Charging a frozen battery can lead to safety risks and even permanent damage.