Wireless chargers like brick chargers can operate at different voltages making them not universal.
Apple is notorious for not following industry standards, choosing instead to create their own standards.
While they argue this is to push innovation and improving user experience… which it is technically speaking… the actual root reason for doing things differently than everyone else is to corner the accessory market.
This way consumers must buy official Apple accessories, or approved accessories, so Apple can make a buck on every accessory sale.
It’s because of this anti-competitive behavior that the EU was forced to step in an mandate USB-C as the charging standard for all cellphones. To prevent Apple from doing exactly what it was accused of doing.
Believe it or not I think there is a simple explanation. Magnetic orientation decides what chargers work with what watches.
About two months ago there was a Reddit post about someone who forgot and wore their Apple watch during an MRI scan.
When they tried charging their watch on their Apple charging puck they could not get it attached, the magnet embedded within the watch had its polarity reversed. The end result was the Apple watch could physically adapt to a Samsung charger but it still wouldn’t charge, probably because it had different voltage levels or it was damaged by the MRI.
So, in the long run, magnetic orientation of the charging pucks are partially responsible with how it determines if a certain puck will work with a particular device. Apple uses one orientation and everyone else is allowed to use the other orientation. This was probably hammered out in a 4,000 page trademark document that Apple would use a particular magnetic alignment and everyone else can use the other.
In order to charge wirelessly, you need to design both chargers and device to have coils that are carefully matched to transmit energy via magnetism.
While the Qi wireless charging standard existed at the time (I think) it is not suitable for watches.
So when Apple released the Apple Watch, they had to invent a way to charge it. They also made the shape very precise so that the charger and watch align and thus maximum charging efficiency can be achieved. wireless charging standard for it.
Try and send an iphone user a picture or video from an Android phone. Quality is shit. It’s their way of saying “you should buy an iphone, your photos are shit on Android”. Trust me, my daughter says that all the time (I’m Android, she’s iphone). It’s why there’s a lawsuit against them right now about trying to monopolize the mobile phone market.
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