Apple Watch Series 3 Battery Lasts Up to 18 Hours, But Varies Based on Activity

Apple says its Apple Watch Series 3 offers "all-day battery life" with 18 hours of usage, but in some cases, the LTE model's battery will drain more quickly.The 18-hour usage metric includes 90 time checks, 90 notifications, 45 minutes of app use, and a 30-minute workout with music playback, and on the LTE model, it includes 4 hours of LTE connection and 14 hours of connection to iPhone via Bluetooth.
When talking on the Apple Watch or working out, though, battery life is shorter when using an L