I stuck this power station in a freezer to test its subzero claims - here's what happened next

• A power station built to survive the cold and be safe to use and charged below freezing.
• The power station has a 1,500 W output, and can power a vast array of appliances.
• You are paying a price -- both in size, weight, and dollars -- for sodium-ion batteries, so consider if being able to handle low-temperatures is important to you.

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Cold weather is a lithium battery killer. And when I say cold can kill batteries, I mean it. 

Without some form of heating, lithium-ion cells begin to struggle to deliver power once temperatures drop below 32°F (0°C). By the time temperatures hit 5°F (-15°C), the battery's capacity can be reduced by 30%-40%, depending on factors such as the battery's age and quality. This loss of capacity can cause devices relying ...