25W Charger not fast charging.

[virajvnc]

25W charger came with the box for note 20 ultra not fast charging.  It only charge normal slow cable charging & super fast charging. Adaptive fast charging (normal fast charge) won't work even it enabled in settings. But when I connected to my old Adaptive charger,  fast charging is showing.  Is there anyone who noticed this? I think 25W charger only supports slow cable charging & super fast charging.

[Dr_Sadesh_Abey]

I figured the issue. Read my other comment for the explanation

[virajvnc]

Thanks bro.

[Dr_Sadesh_Abey]

Bro have u updated ur note 20 ultra to Android 12 One Ui 4?

[virajvnc]

Yes. Couple of weeks ago

[Dr_Sadesh_Abey · Accepted solution]

Ok so this is what has happened. They've removed this feature from note 20 ultra. When i got the phone it was on one ui 3.1 and the adaptive fast charge feature worked.

I tested it today because u were asking about it, and now it only shows cable charging, even with super fast charge off and fast charge on.

They have removed this in one ui 4.

But i noticed a small change, when u switch off everything and leave it on cable charging, the time it takes is longer than when u enable fast charging. Even though fast charge is enabled, it still says cable charging, but the time taken is lesser than actual cable charging.

I hope this solves ur issue. Its something that they changed in One ui 4.

If my comment helped you in any way, please consider hitting the 3 dot menu and accepting my answer as a solution.

Thanks 😊😊

[virajvnc]

Definitely it's the thing. Thanks bro

[Dr_Sadesh_Abey]

My pleasure, glad i could help. Only way to really prove it is to find a Note thats not updated to One Ui 4, but thats kinda impossible now 😅

[ali981]

Yes, you're right — the 25W charger that comes with the Note 20 Ultra supports:

Super Fast Charging (25W)

Regular Charging (slow)

It skips Adaptive Fast Charging (15W) used by older Samsung Adaptive chargers. That’s why:

With the 25W charger, you get either Super Fast Charging or just regular slow charging.

With your old Adaptive Fast Charger, you get Fast Charging (15W), which shows as "Fast charging" on screen.

So yes, it's normal — the 25W charger doesn't do "Adaptive Fast Charging," only the new PPS-based Super Fast Charging and fallback to regular slow charge. Others have noticed this