Why are there so many fast charging standards, and what's the difference between them?

A guide to the confusing world of USB-C fast charging. "Fast charging" has become a catch-all term that can mean many different things. There's USB PD, PPS and even SuperVOOC, which sounds like a limit break in a Final Fantasy game. All the jargon for different standards can be confusing. Fortunately, there's less to w