Power delivery.
If both the charger and device implement it according to the spec they indeed negotiate the voltage and amperage they will deliver.
However not all chargers (properly) implement the spec
So is it generally more expensive brand name ones do stick to the spec, or not as simple as that?
I’ve been often using my 65W laptop supply to charge my phone, earbuds, whatever. But it’s not OEM, so now I’m wondering…
Power delivery. If both the charger and device implement it according to the spec they indeed negotiate the voltage and amperage they will deliver. However not all chargers (properly) implement the spec
So is it generally more expensive brand name ones do stick to the spec, or not as simple as that? I’ve been often using my 65W laptop supply to charge my phone, earbuds, whatever. But it’s not OEM, so now I’m wondering…
It depends. Nintendo for example notoriously doesn’t follow the spec, and some budget laptop oem chargers don’t support all the voltages either