For QC 4.0 do you just need the cable?

jsmoke said:
From a yt video it doesn't look to charge much almost if any faster than a regular charger can anyone confirm?
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Why would it charge faster? QuickCharge does not require any special cable.

If the phone is QC4.0 compatible (of which not many are) then it will charge at whatever rate the maker has specified. Otherwise it will only charge at QC2 or 3 depending on phone. If it's OnePlus etc then they will revert to normal USB charging speeds not fast charging unless you use the propitiatory charger and cable for their fast charging methods. For reference, Samsungs, LGs and other first party makers all support QuickCharge 2.0 minimum with the latest models also supporting USB-PD so a QC4.0 wall charger will output at whatever the maximum those devices support.

According to Google these are the only devices out that support QC4:

  • AGM X3
  • BQ Aquaris X2
  • BQ Aquaris X2 Pro
  • LG G7 ThinkQ
  • LG V40 ThinkQ
  • nubia Z17
  • nubia Z18
  • Razer Phone
  • Razer Phone 2
  • Qiku N7 Pro
  • Smartisan R1
  • Xiaomi Mi 8
  • Xiaomi Mi 8 Explorer Edition
  • Xiaomi Mi 8 Pro
  • Xiaomi Mi A2
  • Xiaomi Mi MIX 3
  • Xiaomi Poco Fi
  • ZTE AXON Pro 9
The S20 is the first phone in the world to support USB-PD 3.0 and its relevant new specs. But don't be fooled by the 25w vs 45W optional adapter. The Note 10+ also supports it (just without the PSS specification certs yet). The actual difference in a full charge time is around 15 minutes between 25W and 45W because after 30% charged from 0, the voltage/current start to tail off to prevent damage to the battery or generate too much heat. This is the dynamic voltage control of USB-PD. 15 minutes is not enough of a timesaver to warrant the extra cost of a 45W charger. from Samsung.

Only Samsung currently make a compatible charger for this 45W spec but other makers will have their models using the same Samsung controller by year end I'd imagine.

Realistically all flagships at minimum should be using USB-PD 3.0 from next year... You'd hope.
 
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