Tests Carried out by Apple in August 2024 employing preproduction Apple Watch Ultra 2 (GPS + Mobile) paired using an apple iphone; all units analyzed with prerelease application. Battery daily life may differ by use, configuration, mobile network, sign power, and a number of other elements; true benefits will change. https://www.jowissa.com/de-na/products/stingray-watch-strap-e3-1114