There's a worrisome problem with electric cars that no one's talking about

Every driver knows that no matter what type of car you drive, winter is taking its toll: less fuel efficiency, lower tire pressure, and frozen windshield wipers and washer solvent, for example.

What you might not know is that all-electric cars suffer far greater in winter time — in terms of fuel efficiency — compared to gasoline and diesel guzzlers.

But there is a way to lengthen the life of your battery during these frigid times.

Let's first compare the numbers:

When temperatures drop below 20 degrees Fahrenheit (F), conventional gasoline cars see a dip in gas mileage of about 12%, while in hybrids that mileage drops by as much as 34%, according to the US Environmental Protection Agency (EPA) and US Energy Department.

That's nothing compared to all-electric cars. In 2014, the AAA Automotive Research Center in Southern California published the results of its study that tested how the driving range of three all-electric vehicles (EVs) varied with temperature. At a steady 20 degrees F, the all-electric vehicles traveled a shocking 57% shorter distance on a single charge than they did at 75 degrees F. On average, an EV's batteries transported drivers105 miles at 75 degrees F, but only 43 miles at 20 degrees F, AAA reported.

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