10 Best Long Battery Life Smartwatch 2025 in the United States

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.

The Samsung Galaxy Watch 7 40mm Bluetooth AI Smartwatch in Cream offers a blend of advanced features and practical functionality, making it a strong contender for those seeking a long-battery-life smartwatch. One of its primary strengths is its emphasis on fitness and wellness tracking, including heart rate monitoring, sleep tracking, and personalized wellness tips. The watch also utilizes Galaxy AI to provide an Energy Score, helping users understand their readiness for the day based on previous activity, which can be motivating for fitness enthusiasts.

The touchscreen and lightweight design add to its user-friendly experience. The product does come with a charging device. For those focused on health tracking and a seamless user experience, the Samsung Galaxy Watch 7 appears to be a reliable option.