Tests conducted by Apple in August 2023 applying preproduction Apple Watch Ultra 2 (GPS + Mobile) paired with an apple iphone; all products analyzed with prerelease software package. Battery everyday living may differ by use, configuration, mobile network, signal strength, and all kinds of other things; real outcomes will vary. https://allhealthmarket.com/product/aeahmarket/appleband/silicone-strap-for-apple-watch/2-packs-floral-engraved-band-for-apple-watch-8-7-se-6-5-4-3-2-1-band-41mm-40mm-38mm-silicone-sport-strap/