Yes as there is more watts in the charger you'll get faster charging. Your phone might be defective go to the samsung service centre.

Thank you 

I recently bought the phone (5G) and previously i was using s9+ its not at par with the old S series but comparing it to s21 the s20 5g is better value for money As s21 is offering same equivalent display resolution and camera settings, except for th...

Nopes im using both the chargers the 15 watt n 25 watt chargers you might be having a defect8ve piece.

r u sure ??