1. Confirm that your Samsung phone model supports 45W fast charging.

2. When the charger is in AI Mode, use a 5A charging cable.

3. When the charger is in other modes, make sure the connected port delivers more than 45W.

Note: If charging a Samsung phone with an Apple Thunderbolt cable, the phone's internal system may activate the charger's protection feature, showing a water-drop warning on the phone and stopping charging.