Apple Watch Ultra 4 extends outdoor tracking to as much as 45 hours in Max Extended Workout mode while keeping second-by-second GPS readings.
Battery life is being framed around the activity, not standby
Ultra 4 offers up to 50 hours for everyday use and up to 84 hours in Low Power Mode, but its more interesting figure for endurance athletes is up to 45 hours of outdoor tracking in Max Extended Workout mode.
Apple keeps GPS active every second
Apple says the 45-hour mode continues taking GPS readings every second, making the feature more relevant to long races and hikes than a battery-saving mode that dramatically reduces tracking detail.
Fifteen minutes of charging changes trip planning
A 15-minute charge can add up to 18 hours of battery life, according to Apple. For travel or endurance events, short charging windows therefore become more useful.
Ultra 4 combines endurance with the new health layer
The same watch also receives the S11 chip, Health Sensing System, higher-frequency HRV, readiness, and new Apple Intelligence features.
Questions people are asking after the Apple event
How long can Apple Watch Ultra 4 track an outdoor workout?
Max Extended Workout mode supports up to 45 hours for outdoor runs, walks, and hikes.
What is Apple Watch Ultra 4's normal battery-life claim?
Apple says it offers up to 50 hours of everyday battery life.
How much battery can a 15-minute charge add?
Apple says 15 minutes of charging can add up to 18 hours of battery life.