Best Long Battery Life Smartwatches of 2025

The Blackview Military Smart Watch offers exceptional durability and functionality for outdoor enthusiasts. Its military-grade frame ensures it withstands extreme conditions, making it the perfect companion for adventures. Enjoy an impressive battery life of up to 30 days with regular use, so you won't have to worry about frequent charging. The built-in LED flashlight and compass provide essential tools for emergencies or navigation in the outdoors. Additionally, you can easily answer and make calls directly from the watch, keeping you connected wherever you are.

The Amazfit T-Rex 3 is designed for outdoor enthusiasts, featuring a bright AMOLED display with peak brightness of 2,000 nits, ensuring you can view maps and workout data easily in any lighting. Built to withstand extreme conditions, its military-grade body is resistant to heat and cold, while also being water-resistant up to 100m, making it ideal for surfing and freediving. With an impressive battery life of 27 days, you can rely on the watch during long hikes without frequent recharging. Additionally, it offers free global maps and advanced GPS, giving you accurate tracking for all your adventures.

The Xiaomi Redmi Watch 5 offers an ultra-large 2.0" LCD display, allowing you to easily view notifications and track your health metrics. With its long battery life, you can enjoy up to 18 days of usage without frequent recharging, making it ideal for those on the go. The Bluetooth calling feature enables you to take calls directly from your wrist, providing convenience and keeping you connected. Additionally, advanced health and workout tracking helps you monitor your fitness progress, ensuring you stay on top of your wellness goals.

The Reflex Active Watch offers a seamless way to stay connected and track your fitness. With call alerts and message notifications, you can easily manage your communications right from your wrist. It also monitors various activities like cycling and running, helping you set and achieve your health goals. The sleep monitoring feature ensures you get the rest you need to perform at your best. Additionally, the watch allows you to control your music, making it convenient to enjoy your favourite tracks without reaching for your phone.

The Tensky GTX12 Smart Watch offers a stunning 1.99” AMOLED display that allows you to easily check the time and messages without any fuss. With Bluetooth calling, you can make calls effortlessly, ensuring you stay connected. Its 24/7 health monitoring tracks vital data like heart rate and sleep patterns, helping you manage your well-being effectively. Plus, with 100 sport modes, you can automatically track various activities, giving you real-time health insights during your workouts.

The Amazfit Bip 5 is an impressive smartwatch featuring an ultra-large 1.91-inch display, allowing you to enjoy vibrant visuals with ease. With Bluetooth calling, you can conveniently answer or make calls directly from your wrist, keeping you connected without needing your phone. The device also supports over 70 downloadable apps and games, adding versatility to your experience. Plus, it boasts more than 120 sports modes, making it a perfect exercise companion that tracks your activities and helps you stay fit.

The Mi Smart Band 9 features a lightweight aluminium alloy frame and an impressive 1.62-inch AMOLED display. This always-on screen provides a vibrant viewing experience, making it easy for you to interact with your watch. With 24/7 health tracking, you can monitor your heart rate and sleep patterns in real time, helping you to stay informed about your health. Additionally, with over 150 workout modes, you can track your fitness progress and achieve your goals more effectively. The watch is also 5ATM waterproof, allowing you to wear it while swimming without worry.

The Apple Watch Ultra 2 is the ultimate sports and adventure smartwatch designed for active individuals like you. With a robust titanium case and a super-bright Always-On Retina display, it ensures durability and visibility in all conditions. The precision dual-frequency GPS offers outstanding accuracy for your runs, cycles, or hikes, helping you track your performance effortlessly. With a remarkable battery life of up to 36 hours, you can enjoy your activities without worrying about frequent charging.

The imoo Z1 Smartwatch offers excellent features for keeping your child safe and connected. With HD video and phone call capabilities, you can enjoy face-to-face communication and see your child's surroundings. The real-time GPS locating feature allows you to monitor your child's location effortlessly, giving you peace of mind wherever they are. This smartwatch also boasts IPX8 waterproof protection, meaning your child can play in water without worry, while the long battery life ensures that it remains functional throughout their busy day.

The Garmin Forerunner 255 offers a sleek design and an always-on colour display, making it lightweight and easy to read, even in bright sunlight. You can monitor your running power using a compatible Running Dynamics Pod or HRM-Pro, helping you manage your efforts effectively. With a remarkable battery life, it lasts up to 14 days in smartwatch mode and 30 hours in GPS mode, ensuring you stay connected to your health data. The watch allows you to download up to 500 songs for phone-free listening, making your runs more enjoyable.