VIDEO: Why Your Computer Charger Gets So Hot : Planet Money Our power grid was designed long before the digital age. The electricity it gives out doesn't work right for our computers, phones and gadgets. So what to do?
NPR logo VIDEO: Why Your Computer Charger Gets So Hot

VIDEO: Why Your Computer Charger Gets So Hot

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The nation's power grid pulses with a certain type of electricity: AC power. But our computers and other gadgets crave a different kind of current: DC. The battle of AC versus DC and Nikola Tesla versus Thomas Edison still matters today.

For a little more context after you watch the video above, here's our radio story on people who are pushing to bring back the DC grid.