Can lithium-ion batteries be used in sub-zero temperatures?

Yes. Lithium-ion batteries can operate even below -20°F (around -29°C), though performance may drop. As long as the battery has over 25% charge, freezing won't damage it. However, extremely low temperatures reduce output current, making the battery feel sluggish.

Why do lithium-ion batteries perform poorly in cold weather?

Cold slows down lithium-ion movement inside the battery, reducing capacity and weakening current output. This might cause power tools to run slowly or not start. The battery isn’t damaged—it’s just cold and temporarily underperforming.

Can you charge lithium-ion batteries in cold temperatures?

Not recommended! Charging below 32°F (0°C) can cause lithium metal buildup (dendrites) inside the battery, permanently damaging it. Always warm the battery to room temperature before charging.

What if the battery is too cold? How to "warm it up" safely?

• Keep it in your coat pocket to warm it up using body heat.
• Insert it into a tool and run the tool briefly—the battery will self-warm during use.
• Make a DIY insulated box: use an old cooler with a heating pad (costs under $20).

Can I leave batteries in my car during winter?

Yes, but performance may drop temporarily in extreme cold. I’ve left batteries in my truck through -40°F winters and never had one break. They just start slowly and bounce back once used. For long-term storage, room temperature is better.

Will the battery casing crack from the cold?

Plastic casings can get brittle in freezing weather. If the battery is dropped or stressed while frozen, clips or tabs might crack. Handle cold batteries gently and avoid impacts.

Do I need a special charger for cold-weather lithium-ion batteries?

Usually not. Some chargers include temperature protection and won’t charge if the battery is too cold—this is a good thing. Just wait until the battery warms up before trying again.

If you’re looking for professional lithium-ion battery solutions that work at -40°C or lower, feel free to contact us. We offer custom, industrial-grade low-temperature battery packs and cells for all kinds of cold-weather applications.