Wireless Charging
Wireless charging (also known as inductive charging or cordless charging) is a type of wireless p ower transfer. It uses electromagnetic induction to provide electricity to portable devices. As the name indicates, it does as such without the utilization of a physical wire. The most common application is the Qi wireless charging standard for smartphones, smartwatches and tablets. They are used in vehicles, power tools, electric toothbrushes and medical deviceS
Wireless charging has been around since the late 19th century, when electricity pioneer Nikola Tesla demonstrated magnetic resonant coupling – the ability to transmit electricity through the air by creating a magnetic field between two circuits, a transmitter and a receiver. But for about 100 years it was a technology without many practical applications, except, perhaps, for a few electric toothbrush models.
Today, there are nearly a half dozen wireless charging technologies in use, all aimed at cutting cables to everything from smartphones and laptops to kitchen appliances and cars.
How does it work?
Wireless charging works by transferring energy from the charger to a receiver in the back of the phone via electromagnetic induction. The charger uses an induction coil to create an alternating electromagnetic field, which the receiver coil in the phone converts back into electricity to be fed into the battery
Pros
Wireless technology
Large charging pad can charge multiple devices at same time.
Charging pad last longer than cable.
Light weight and can be used with a wireless battery pack for no-cord traveling.
Cons
Cables are cheap.
Slower than wired charging speed.
20% of the power generated by the wireless charger goes off waste in air.
List of few Qi enabled phones
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