Apple somehow has managed to fit a massive battery in the Apple Watch Ultra because of its redesigned design and 49mm case size. With normal use, the Apple Watch Ultra may last up to 36 hours on a single charge; however, a new Low Power Mode and battery optimization settings can extend this time even further.

For the 36-hour metric, Apple determines “normal” use as 180-time checks, 180 notifications, 90 minutes of app use, and a 60-minute workout with Bluetooth music playback from the Apple Watch Ultra. Plus, it offers a combined 28 hours of Bluetooth connectivity to the iPhone as well as eight hours of LTE connectivity.

The Apple Watch‘s actual battery life will vary based on its actual use. Longer workouts that use the cellular connection and consume the battery more quickly are both possible.

In watchOS 9, Apple wants to add a Low Power Mode that will be compatible with all Apple Watch models, including the Series 4 and later. By enabling Low Power Mode, the watch will disable or limit functionality like the always-on display, workout autostarts, and heart health notifications.

To achieve the longest possible battery life, the Apple Watch Ultra also contains specific battery optimization functionality, which will be available later this fall.

The Apple Watch Ultra will be the first Apple Watch to deliver more than 24 hours of battery life so that users may go several days without charging when battery optimization releases, lasting an unbelievable 60 hours. According to Apple, multi-day “adventure” battery life is based on Low Power Mode and workout settings that enable fewer GPS and heart rate readings.

Meanwhile, all new Apple Watches, including Watch Series 8, new Watch SE, and Watch Ultra are now available for pre-order and will be available to customers from September 16 while Watch Ultra will be available to customers from September 23, 2022, also, the watchOS 9 is scheduled to release on Sept. 12, 2022.