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2. Inductive charging - Wikipedia

   en.wikipedia.org/wiki/Inductive_charging

   Inductive charging. The primary coil in the charger induces a current in the secondary coil in the device being charged. Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in ...

3. Wireless power transfer - Wikipedia

   en.wikipedia.org/wiki/Wireless_power_transfer

   When the phone is set on the pad, a coil in the pad creates a magnetic field [1] which induces a current in another coil, in the phone, charging its battery. Wireless power transfer ( WPT ), wireless power transmission, wireless energy transmission ( WET ), or electromagnetic power transfer is the transmission of electrical energy without wires ...

4. uBeam's Ultrasound Wireless Charging Is Real ... - TechCrunch

   techcrunch.com/2015/04/26/kill-the-cord

   A lot of smart people believe.. Wireless Power Via Ultrasound. Plenty of other companies have tried and failed to produce true wireless power, with some ending up doing magnetic resonance charging ...

5. Qi (standard) - Wikipedia

   en.wikipedia.org/wiki/Qi_(standard)

   The standard allows compatible devices, such as smartphones, to charge their batteries when placed on a Qi charging pad, which can be effective over distances up to 4 cm (1.6 in). [2] The Qi standard is developed by the Wireless Power Consortium. [1] As a universal, open standard Qi-enabled devices are able to connect to Qi chargers from any ...

6. uBeam Finally Reveals The Secret Of How Its Wireless Charging ...

   techcrunch.com/2015/10/08/how-ubeam-works

   Finally, uBeam believes its ultrasound technology works much better than the two other forms of wireless charging: induction, which requires an inconvenient physical connection like the Apple ...

7. Wireless charging: Are we doing this or not? - Engadget

   www.engadget.com/2018-10-10-wireless-charging-we...

   What's more, inductive charging doesn't work through metal currently. That means that inductive-compatible phones must have either a glass or plastic back in order to successfully access wireless ...