Testing carried out by Apple in August 2024 working with preproduction Apple Watch Ultra 2 (GPS + Cellular) paired with the apple iphone; all gadgets analyzed with prerelease program. Battery life may differ by use, configuration, cellular network, signal strength, and all kinds of other things; true outcomes will vary. https://www.jowissa.com/de-na/products/facet-strass-swiss-ladies-watch-j5-714-s