Wireless charging is not something that happens by itself. Not all devices can charge wirelessly. It took scientists a while to find a way to make wireless charging transfer energy in a manner that was efficient enough to be practical.
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The induction coil is a flat coil of wire wrapped around a small magnet that connects to the wireless charger.
An electric current passing through the coil of wire creates an electromagnetic field that surrounds the magnet. This allows it to transfer charge to nearby objects, such as a battery.
You may be surprised to learn that wireless charging, which transfers energy between objects using an electromagnetic field, is a concept that has existed for more than 100 years. It was first discovered by Nikola Tesla.
However, devices must be able to stop charging and restart automatically. That’s where standards come into play.
There are many types of wireless charging, as with all things in technology. Each standard operates in a different way, which means they have different compatibility and performance. Wireless chargers don’t just provide power 24 hours a day.
A standard also governs how they communicate with one another. A wireless charger can “talk” with another wireless charging device that follows the same standard.
They will verify that there is a valid charging session and then charge. The communication determines when the charging session will end, as long as the battery has fully charged.