Technology
Your phone charges without touching anything. That should feel like magic. It is actually 200-year-old physics.
Wireless charging uses electromagnetic induction: a coil in the charger creates a changing magnetic field, which induces current in a matching coil inside the device.
Faraday physics
The principle was discovered in 1831 by Michael Faraday.
Qi standard
Most phones and chargers use the Qi wireless charging standard.
Heat is waste
Wireless charging loses more energy as heat than wired charging.
Alignment matters
Misaligned coils reduce efficiency and increase heat.
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