Hi Marilyn
Yes, that is correct.
If you already have a standard-compliant Fastcharg adapter, then it should work (e.g. the adapter on my Dell notebook works).
Unfortunately, the adapter on my old Huawei didn't work. However, this may be because Huawei did not adhere to the standard.
I then bought a Google adapter.
Stefan

I ordered the original Google charging adapter, which charges at 18W. More than 18W is not possible, with a 33W power supply the mobile automatically reduces to 18