The Apple Watch Series 7 boasts a battery life of about 18 hours on a single charge, maintaining the same all-day battery life as previous models despite having a larger and brighter display. This duration is designed to last through a typical day, including workouts, app usage, and staying connected. Additionally, the Series 7 supports faster charging than its predecessors, reaching 80% charge in about 45 minutes, which can be particularly convenient for quick top-ups during short periods of downtime.