You are right. The 3300 label is just a generalized number to describe the cell. You want your charger to charge the cells as high as they can take for maximum voltage. I set my charger for 4500 and let the charger find the peak so I know its fully charged. You also need to set the delta peak detection shut off so you are telling the charger what to look for when the cells peak and want to drop off. People debate this, but it should be around 6-8 per cell, but that's another topic.
RC Car Action Editor and Photographer