You've probably heard of quick charging, adaptive fast charging, rapid charging, USB power delivery charging, and Qualcomm Quick Charge 2.0/3.0/4.0 before - or at least one or two of these things. What you may not know is that all but one of them are actually basically the same thing, based on the same licensed technology from Qualcomm known as Quick Charge. More recently, Qualcomm's technology has slowly been supplanted by the likes of USB Power Delivery, the standard for charging governed by the USB-IF, the body behind USB itself. Additionally, new proprietary standards from companies like Oppo, OnePlus, and Huawei have split off from both Qualcomm and the USB-IF, further increasing the amount of charging confusion out there in the market.

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