One thing that hasn't been clear to me is whether or not USPS Ground Advantage is always by ground/surface. With Parcel Select Ground, it was always by ground. Ebay labels used to allow declaration of restricted substances, such as Lithium batteries, but later dropped that feature. It seemed as long as the USPS was delivering by ground, that was okay. First Class often went by air, so that was not an option. My Post Office even disallowed First Class shipping of a quartz watch with a battery, so that made selling watches like that mostly impractical. I saw somewhere that if we ship something by Ground Advantage that actually needs to go by ground, we need to label it as, "Restricted Electronic Device, Surface Only." Is that true? That implies that some packages shipped by Ground Advantage actually fly, which seems odd. Would putting such a label on the package ensure that it is handled differently? This potentially opens up shipping some lighter items with batteries at lower cost.
