Tests done by Apple in August 2024 making use of preproduction Apple Watch Ultra 2 (GPS + Cellular) paired using an apple iphone; all products examined with prerelease software. Battery daily life differs by use, configuration, cellular community, sign strength, and a number of other elements; real success will differ. https://www.jowissa.com/de-na/products/facet-strass-swiss-ladies-watch-j5-015-m