Fuck Linus "Tech Tips"
this post was submitted on 23 Feb 2024
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Phones don't use much energy. I'm not getting the "efficiency" thing for wireless charging. Even new standards are basically the same.
This CEO sounds like he has no idea what he's talking about
The long and short of the lower efficiency of wireless charging is a concept called Free Space Loss
In order for energy to pass through an open space it has to use some energy. Unlike a cable where the pins are contacting and the loss is far lower.
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Energy lost as heat during the power transmission. It's what makes the phones warm during wireless charging. That heat decreases the lifespan of the battery and makes the phone uncomfortable to use, which is why wireless charging speed is limited once the phone reaches a certain temperature. I specifically avoid using wireless charging on my Pixel to extend its battery lifespan since it will live for 7 years and battery replacement is expensive. New wireless charging standards could probably play with frequency and other parameters in order to reduce energy lost as heat, similar to how increasing the voltage in a circuit decreases loss to heat for the same cables.
I specifically avoid using wireless charging on my Pixel to extend its battery lifespan
You shouldn't bother. I exclusively charge my Pixels wirelessly and keep them around forever as development devices and the batteries on all of them are fine.
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