The Porsche Mission E has been spied again, this time undergoing cold weather testing near the Arctic Circle.
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Although the prototypes seen here are wearing the same level of disguise as the vehicles in our first batch of spy photos, the snow-covered surroundings and low winter sun show off a little more of the Mission E's curves and detailing.

Up front there's a just a bit of tape hiding the Porsche badge, and some false panels surrounding the headlight clusters. Around the side, there's also some disguise on the car's C-pillar.

Most of the car's black camouflage is saved for the rear, with parts of the tail-light assembly, boot-lid garnish and rear bumper obfuscated. There's also a false set of exhaust tips stuck onto the diffuser-style rear element.

As we noted earlier, the production version of the Mission E remains faithful to the 2015 concept car, but has a less aggressively curved roof line, which should make the rear seats a more acceptable place for those parked back there.

The production version also loses the rear suicide doors from the concept. The Mission E looks to be smaller than the second-generation Panamera, which is over five-metres long in standard-wheelbase form.

According to our spy agency, the Mission E prototypes seen here got a stern test, as it was a chilly -20 degrees Celsius when these photos were snapped.

The Mission E's drivetrain details have yet to be confirmed, but the concept had a total of 440kW of power from two electric motors. The concept had a claimed range of 500km on a full charge, and a 0-100km/h time of 3.5 seconds.

It's still not clear when the Mission E will be launched or when it will go on sale, but rumours indicate a debut possibly late in 2018 or early 2019.

When it does hit showrooms, it will likely be pitched against higher grades of the Tesla Model S.