1.25a is not fast charging, at least not the new standard. You need at least 3a, and 5 is ideal. You also need a matching cable capable of carrying those loads. USB-A caps out at 1.5a.
What standard are we talking about? I don’t think there’s any standard names “fast charging”.
People on the internet seem to use it to indicate anything faster than the 5W USB 2 allows (7.5W if your ports exceed spec for old fashioned iPad charging).
1.25A on nornal USB voltage isn’t fast charging, I agree, but the voltage is negotiated to 12V, which turns those 1.25A into 15 watts. That’s three times the standard spec for USB charging and twice the spec for the weird 1.5A charging that Apple and other phone manufacturers squeezed out of old USB ports.
My Android firmware calls this fast charging (one USB PD succeeds) at the very least, and I agree with it.
1.25a is not fast charging, at least not the new standard. You need at least 3a, and 5 is ideal. You also need a matching cable capable of carrying those loads. USB-A caps out at 1.5a.
What standard are we talking about? I don’t think there’s any standard names “fast charging”.
People on the internet seem to use it to indicate anything faster than the 5W USB 2 allows (7.5W if your ports exceed spec for old fashioned iPad charging).
1.25A on nornal USB voltage isn’t fast charging, I agree, but the voltage is negotiated to 12V, which turns those 1.25A into 15 watts. That’s three times the standard spec for USB charging and twice the spec for the weird 1.5A charging that Apple and other phone manufacturers squeezed out of old USB ports.
My Android firmware calls this fast charging (one USB PD succeeds) at the very least, and I agree with it.