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.