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Apple Watch Ultra 3 vs. Ultra 2, Series 11: Battery comparison

by Milan
September 10, 2025
Apple Watch Ultra 3 Apple

Image: Apple

The Apple Watch Ultra 3 brings significantly improved battery life to the Ultra line for the first time. The new Series 11 also benefits from longer battery life and more efficient power management. Both models set new standards and demonstrate Apple's increased focus on battery performance. A comparison with the Apple Watch Ultra 2 clearly demonstrates just how significant the improvements truly are.

From the outset, the Apple Watch Ultra was positioned as a model for extended use and maximum endurance. The battery life was the deciding factor, especially for sports, outdoor activities, or travel. Over the years, the Apple Watch's battery life has remained relatively stable overall. With the Apple Watch Ultra 3 and Series 11, the picture has changed noticeably. For the first time, there are major leaps that make a real difference in everyday life.

Apple Watch Ultra 3 battery life

The Apple Watch Ultra 3 can last up to 42 hours under normal use. This is a clear improvement over the Ultra 2 and the longest battery life Apple has ever claimed for a watch. In power-saving mode, the Ultra 3 can last up to 72 hours, making it suitable for multi-day use without recharging.

Apple Watch Ultra 2 battery life

The Apple Watch Ultra 2 offered the highest battery life in Apple's portfolio to date. It lasted up to 36 hours in normal use, and 72 hours in power-saving mode. The difference compared to the Ultra 3 is therefore particularly noticeable in everyday use, where the new generation offers six hours more battery life.

Apple Watch Series 11 battery life

The Series 11 surprises with significantly more battery life than its predecessors. It lasts up to 24 hours in normal use and up to 38 hours in power-saving mode. This brings the Series line closer to the Ultra models without reaching their peak performance. However, for everyday use, it represents a noticeable improvement.

Fast charging in comparison

In addition to battery life, charging speed plays an important role. All three models support fast charging, but they differ significantly:

  • Apple Watch Ultra 3: up to 80 percent in about 45 minutes, 15 minutes for 12 hours of normal use, 5 minutes for 8 hours of sleep tracking
  • Apple Watch Ultra 2: 0 to 80 percent in about 1 hour
  • Apple Watch Series 11: up to 80 percent in about 30 minutes, 15 minutes for 8 hours of normal use, 5 minutes for 8 hours of sleep tracking

The Ultra 3 and Series 11 charge noticeably faster than the Ultra 2. What's particularly useful is that you can charge enough power for half a day or a whole night of sleep tracking in just a few minutes.

Significance of the improvements

The extended battery life is noticeable in both new models. For the Ultra 3, this means more independence during outdoor adventures or long training sessions. The Series 11 gains flexibility in everyday life and moves closer to the Ultra. With this, Apple is sending a clear signal that battery performance is now being further developed after years of little change.

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Apple Watch with battery focus: Ultra 3 and Series 11 have the advantage

The Apple Watch Ultra 3 is currently the model with the longest battery life in Apple's portfolio and also boasts improved fast charging. The Series 11 proves to be more durable than its predecessors in direct comparison, offering, for the first time, a viable alternative for users who don't need an Ultra but still value long battery life. The Ultra 2 remains solid, but visibly loses its appeal compared to the two new models. With its combination of longer battery life and faster charging, the Apple Watch Ultra 3 sets new standards. The Series 11 also benefits significantly, with Apple launching two models with noticeable battery improvements this year. The best products for you: Our Amazon Storefront offers a wide selection of accessories, including accessories for HomeKit. (Image: Apple)

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Apple Watch Ultra 3: Frequently Asked Questions about Battery Life

How long does the Apple Watch Ultra 3 last with normal use?

The Apple Watch Ultra 3 achieves up to 42 hours of typical use, six hours longer than the Ultra 2 and offering the longest battery life of any Apple Watch.

How long does the Apple Watch Ultra 3 last in power saving mode?

In power-saving mode, the Apple Watch Ultra 3 can last up to 72 hours. This makes it ideal for longer trips and outdoor activities without daily charging.

What is the difference in battery life between Apple Watch Ultra 3 and Ultra 2?

The Apple Watch Ultra 3 offers up to 42 hours of battery life, while the Ultra 2 has a maximum of 36 hours. In power saving mode, both last 72 hours.

How fast does the Apple Watch Ultra 3 charge?

The Apple Watch Ultra 3 charges up to 80 percent in about 45 minutes. Just 15 minutes of charging time is enough for about 12 hours of use, and 5 minutes for 8 hours of sleep tracking.

Does the Apple Watch Ultra 3 have better charging than the Ultra 2?

Yes, the Apple Watch Ultra 3 charges significantly faster. While the Ultra 2 takes about an hour to charge from 0 to 80 percent, the Ultra 3 achieves the same rate in about 45 minutes.

How does the Apple Watch Ultra 3 compare to the Series 11?

The Series 11 achieves up to 24 hours of normal use and 38 hours in power saving mode. The Ultra 3 lasts significantly longer, with up to 42 hours.

Is the Apple Watch Ultra 3 suitable for longer outdoor tours?

Yes, with a battery life of up to 42 hours and 72 hours in power saving mode, the Apple Watch Ultra 3 is particularly suitable for outdoor adventures.

Can the Apple Watch Ultra 3 be used for sleep tracking overnight?

Yes, thanks to fast charging, just 5 minutes of charging is enough to prepare the Apple Watch Ultra 3 for 8 hours of sleep tracking.

Is the Apple Watch Ultra 3 the Apple Watch with the longest battery life?

Yes, the Apple Watch Ultra 3 is currently the model with the longest battery life in Apple's portfolio. No other Apple Watch offers more endurance.

Is it worth upgrading from the Ultra 2 to the Apple Watch Ultra 3?

An upgrade is worthwhile, especially because of the longer battery life and improved charging speed. Those who value maximum endurance will benefit significantly.

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