Apple Watch Ultra 4 is aimed at users who spend long periods outdoors, and its biggest change is endurance. Apple says the watch can provide up to 50 hours of everyday battery life, up to 84 hours in Low Power Mode and up to 45 hours of outdoor workout tracking in its longest mode.
Apple separates the workout figures into two modes. Extended Workout mode can track outdoor activity for up to 25 hours with full GPS and heart-rate readings, which the company describes as a 25 percent increase from the prior model. Max Extended Workout mode can record runs, walks and hikes for as long as 45 hours while continuing to take GPS readings every second.
The numbers are designed for demanding use cases. Apple says the longest mode is typically enough to finish a 100-mile race, but actual battery life can vary with settings, temperature, cellular use, workout type and the condition of the battery. A published estimate is not a guarantee for every trail or training plan.
Ultra 4 also includes the Health Sensing System and the S11 chip. Apple says the watch adds higher-frequency heart rate and HRV measurements, a readiness score and what it calls the most accurate on-device GPS in a sports watch. Those features connect endurance with more detailed workout and recovery information.
Charging is faster as well. Apple says 15 minutes of charging can add up to 18 hours of additional battery life. That can reduce the pressure to leave the watch charging overnight before an early start, although users should still plan around the length of their activity and keep a backup route or device for safety.
Apple Watch Ultra 4 comes in natural and black titanium and is available to preorder, with availability beginning September 18. The outdoor focus is clear, but buyers should compare the advertised modes with their own needs. The product’s value will depend on whether the longer tracking time, faster charging and GPS behavior justify its position above Apple’s regular smartwatch models.
