Sleep Tight Relax - Calming Bedtime Stories and MeditationsSleep Tight Media / Starglow Media
Batteries are everywhere — they’re in our phones, our computers, our cars, our toys. But how do they work? To find out, we talk to a scientist who’s making really big batteries to store renewable energy, another who’s working on really small ones to power our phones, and we play in a park with a dog.
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Dansk
Danmark