Tesla's Roadster will receive an update allowing it to travel 400 miles on a charge

Roadster upgrade will enable non-stop travel from LA to SF -- almost 400 mile range. Details tmrw. Merry Christmas!

- Elon Musk (@elonmusk) December 25, 2014

And here you thought only bad things happen on Christmas. Whereas most companies would avoid announcing good news on a day when no one is paying attention, Tesla CEO Elon Musk does things a bit differently. Musk just teased some news on Twitter about the company's Roadster line, saying a forthcoming upgrade would endow the car with a 400-mile range -- enough to drive from LA to San Francisco without having to stop for a recharge. As you can imagine, one can only convey so much in a 140-character tweet -- Musk says he'll be back with more details tomorrow.

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