10 Best Long Battery Life Smartwatch 2025 in the United States

The Apple Watch Series 10 is a robust smartwatch that packs in a lot of features for health, fitness, and connectivity, but it falls short of expectations in the long-battery-life category. With a maximum battery life of up to 18 hours under normal use, it can extend to 36 hours in Low Power Mode. The fast charging feature is commendable, allowing the watch to reach 80% in about 30 minutes, which is convenient for quick top-ups but still requires frequent charging for all-day use.

The display is impressive, featuring an Always-On Retina display that’s bright and easy to read. Its health and fitness tracking capabilities are among the best in the market, providing advanced metrics, ECG functions, and comprehensive sleep tracking. This makes it a good option for those who are serious about monitoring their health. Another strength is its build quality. The watch is durable, water-resistant up to 50 meters, and dust-resistant (IP6X-certified), making it suitable for various activities, including swimming and outdoor sports. Its integration with the Apple ecosystem allows users to stay connected seamlessly, enjoying features like notifications and calls directly from their wrist.

Customization options are plentiful, allowing users to choose from various bands and watch faces, making it a stylish accessory. On the downside, users who are not already invested in Apple products may find it less appealing due to compatibility restrictions with iOS devices. Also, while the watch includes impressive features, the additional cost compared to other smartwatches may not justify the purchase for casual users.

While the Apple Watch Series 10 excels in health tracking and connectivity, its battery life may not meet the expectations of users looking for a long-lasting smartwatch, making it better suited for those who prioritize advanced features over extended battery performance.

The Garmin fēnix 8 is a strong choice for anyone needing a long-lasting smartwatch, especially athletes and outdoor enthusiasts. It features a bright 1.4-inch AMOLED display protected by a scratch-resistant sapphire lens, making the screen clear and durable. The watch’s battery life stands out, offering up to 29 days in regular smartwatch mode and up to 84 hours when using GPS, which is excellent for extended adventures without frequent charging. It also supports power-saving modes to help stretch battery life further.

Beyond battery and display, this watch includes advanced fitness and health tracking tools, such as stamina monitoring, sleep tracking, heart rate measurement, and even an ECG app, which gives detailed wellness insights. It also supports phone calls and voice commands, both online and offline. The built-in GPS with multi-band technology and sensors like a compass and barometric altimeter provide accurate navigation, useful for hiking or diving (the watch is rated for water resistance up to 40 meters).

The watch weighs around 102 grams, which might feel a bit bulky for some users, especially those with smaller wrists. The battery capacity is 5 mAh, which sounds low but is typical for smartwatches due to efficient power management. Some health features like Pulse Ox and ECG may vary based on location. This device is well-suited for those who prioritize long battery life, rugged outdoor use, and detailed fitness tracking. It may offer more features than necessary for casual users seeking a simple daily smartwatch, but it serves as a reliable, feature-packed option for adventurers and multisport athletes.

The Garmin Forerunner 165 is a running smartwatch designed to cater to fitness enthusiasts, particularly those who value long battery life. It boasts a colorful AMOLED display, which is not only vibrant but also supports touch functionality alongside traditional button controls for ease of use. The lightweight design ensures comfort during prolonged wear, making it suitable for both casual users and serious athletes. One of its standout features is the impressive battery life, offering up to 11 days in smartwatch mode and up to 19 hours in GPS mode, making it perfect for long-distance runners or those who prefer fewer charging sessions.

Additionally, the built-in GPS and wrist-based heart rate monitor provide accurate tracking of pace, distance, and health metrics. The smartwatch also offers personalized workout suggestions and adaptive training plans, which can be very useful for users looking to optimize their fitness routines. With over 25 built-in activity profiles, it caters to a wide variety of sports and exercises, providing flexibility for different types of workouts. However, users should be aware that the Garmin Forerunner 165 does require setup with a compatible smartphone for some of its advanced safety and tracking features, such as incident detection and sending emergency messages.

Moreover, while the AMOLED display is visually appealing, it may consume more battery life compared to simpler display types when used extensively. On the positive side, the convenience of smart notifications, contactless payments with Garmin Pay, and the ability to compete and connect with friends via the Garmin Connect app add to the user experience. The Garmin Forerunner 165 is a well-rounded smartwatch that offers strong battery performance, comprehensive fitness tracking, and additional smart features, making it a great choice for both everyday use and dedicated fitness activities.