By Marcus Reed • 2026-09-10

Apple Watch Ultra 4 Unveiled: 50-Hour Battery and Max Workout Mode

Apple has unveiled the Apple Watch Ultra 4, elevating endurance benchmarks for endurance athletes and outdoor expeditions. Retaining its signature 49mm Grade 5 titanium chassis, the newest flagship delivers significant energy architecture gains, pushing everyday runtime to 50 hours while introducing dedicated endurance GPS tracking modes.

Architectural Battery Leaps: From 50 to 84 Hours

The defining advancement of Apple Watch Ultra 4 is battery longevity. Everyday runtime climbs from 42 hours on Ultra 3 to a full 50 hours under normal multi-sensor usage. In Low Power Mode, operation extends up to 84 hours. For athletes tackling ultra-distance events, standard outdoor GPS and continuous heart rate tracking lasts approximately 18 hours, stepping up to 25 hours with Extended Workout mode.

The new Max Extended Workout mode enables up to 45 hours of continuous outdoor trail runs, hikes, or 100-mile ultramarathons while preserving 1-second GPS location fixes. Rapid magnetic charging adds 18 hours of life in 15 minutes, or reaches 0 to 80 percent in 45 minutes. Estimate your continuous sensor drain across disciplines using our Apple Watch battery calculator and verify chassis dimensions in our Apple Watch model identifier.

Preserved Benefit: Athletes secure multi-day expedition GPS logging with 1-second precision without requiring cumbersome external battery packs on remote trails.

Explicit Trade-Off: Achieving 45 hours of continuous GPS telemetry throttles non-essential background services, cellular polling frequency, and screen refresh rates during endurance mode.

Rugged Chassis Refinements and Multisport Tracking

Constructed with 100 percent recycled Grade 5 titanium, the Ultra 4 measures 49 x 44 x 12 mm and weighs 63 grams. Sapphire crystal shields the wide-angle Always-On LTPO3 OLED display, delivering 3,000 nits peak brightness and dimming down to 1 nit. Water resistance remains certified to 100 meters with 40-meter recreational scuba dive computer capability powered by Oceanic+.

Equip your expedition dashboard with high-contrast complications in our watch face gallery or optimize your training intensity using our running pace calculator.

Watch Faces

Mini Games — Four games on your watch — Bricks, Snake, 2048 and Tic Tac Toe. Play in the app, then read the frozen frame of your last game right on the dial, next to battery, weather, steps and calories. Inspired by 2048 by Gabriele Cirulli (MIT).
Pocket Pals — A virtual pet you raise — it grows through life stages, shows its mood, and lives in a little world that blooms with good care. The four rings are your real data: battery, weather, steps and calories.
Bunker Dashboard — Retro phosphor terminal with weather, battery charge, and vital stats.
Weather Dashboard — Current weather and conditions, daily low (↓) and high (↑) temperature, wind speed, and battery. Powered by Apple Weather.
Weather Simple — Current weather icon and temperature at a glance, daily low (↓) and high (↑) temperature, wind speed, and battery. Powered by Apple Weather.
Retro Dashboard — Casio-style 7-segment LCD with battery, exercise minutes, distance, heart rate, steps, weather, and humidity.
Outdoor Companion — Temperature, wind speed, steps, distance and calories — everything for your outdoor adventures. Battery level included.
Blueprint Dashboard — Industrial blueprint frames with date, weather, steps, calories, flights climbed and battery.
Weather Condition — Current weather condition with temperature and localized date. Battery level included.
UV & Sun Tracker — UV index with sun arc, hourly UV forecast, sunrise time, sunset countdown and temperature.
Rain Forecast — Minute-by-minute precipitation forecast with adaptive status, precipitation chance, humidity, temperature and wind.
Fitness Dashboard — Track your activity with a dynamic robot companion. Battery, temperature, steps, calories, exercise minutes, and stand hours.
Active Dashboard — Heart rate, steps, distance and weather at a glance.
Step Counter — Steps as the main focus with progress toward 10,000 goal. Distance, calories and battery at a glance.
Moon Phase — Track the lunar cycle with current phase, percentage, and days until the next full moon.
Heart Rate Zones — Track your heart rate zones with daily chart, current heart rate, and key metrics.
Heart Rate Live — Live heart rate with ECG visualizer and daily activity metrics.
Doodle Dashboard — Playful hand-drawn marker face with date, weekday, battery, steps, calories, heart rate and temperature in colorful doodles
Racer Dashboard — Automotive instrument cluster with twin dials for steps and heart rate, plus gauges for humidity, battery and temperature
Digital Cluster — Glowing twin-dial cluster with battery, steps, heart rate, distance, humidity and temperature gauges
NEON GAUGE — Big glowing numbers over gradient arc gauges
Vitals Weather — Weather, steps, calories and heart rate at a glance on a bold filled dashboard.
Vitals Activity — Steps, calories, distance and heart rate — your full activity picture.
Vitals Heart Rate — Live heart rate front and center with calories, steps and stand hours.
Vitals Rings — Move, exercise and stand goals with steps, calories and distance.
Vitals Date — A large date with daily activity — steps, calories and heart rate.
Vitals Calories — Active energy and activity — calories, steps, distance and heart rate.
Vitals Distance — Distance, steps, calories and heart rate for every workout.
Vitals Moon — Moon phase, sunrise and sunset with steps and battery.
Vitals UV — UV index, sunrise and sunset with temperature, humidity and steps.

Curated Packs

The Weather Pack — Five ways to read the sky — from hourly UV to minute-by-minute rain forecasts.
The Outdoor Pack — Built for the trail, the summit, and the long way home.
The Fitness Pack — Activity rings, heart rate zones and step counters — every metric within a glance.

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