charging

Is electric really the future of cars?

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Electric cars are no longer a niche. Global sales have grown fast over the past decade, and in several countries a large share of new cars sold is now electric; in Norway, nearly all of them are. At the same time, growth has been uneven, and many drivers still have good reasons to wait. The … Read more

Electric toothbrush charger: how it works and how to fix charging problems

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Most electric toothbrushes have no metal contacts. They charge by induction: a coil in the base creates a magnetic field, and a coil in the handle turns it back into current. That keeps the handle sealed and water-resistant, which is why you can rinse it under the tap. Can you use a different charger? Usually … Read more