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Nowadays, when we buy an adapter, we often see the words GAN and PD coming up all the time. These two things are new charging technologies that can induce electricity better, emit less heat, and reduce electromagnetic wave interference, making energy use more efficient. PD or Power delivery is a standard value for power supply. In order to choose an adapter that suits your usage, where do the details of these two things come from? Phi Lam, the IT geek, will tell you in Smart Choice.