It all depends on what device you have, the charge it can take and the charger you have?
You can get 15w, 25w and 45w chargers, your devices can accept a certain charge too
Pair them together and you have different charge levels
A7 Lite tablet Suport up to 25w, Samsung S22U 45w charge my old s3 support 15w charge its all different
I don't have s3 anymore by there way