10 Best Battery Life Smartwatch 2025 in the UK

The Google Fitbit Inspire 3 Activity Tracker offers a notable battery life of up to 10 days, making it a strong contender for those who value longevity without frequent recharging. This is particularly advantageous for users with busy lifestyles or those who engage in extended outdoor activities.

The device supports multiple power-saving features, such as automatic exercise tracking and stress management notifications, which help in conserving battery while providing essential health insights. Charging time is relatively efficient, and the included lithium-ion battery ensures a reliable energy supply over prolonged use.

The actual battery life can vary significantly based on usage patterns, especially if features like heart rate monitoring, GPS, and notifications are used extensively. The water-resistant design (up to 50 meters) adds to its durability, but frequent use of the color touchscreen and continuous Bluetooth connectivity may reduce battery life expectancy. For users who prioritize a balance between functionality and battery performance, the Fitbit Inspire 3 stands out as a versatile option, but those requiring constant advanced tracking features might find the battery depletes quicker than advertised.

The Garmin vívoactive 5 is a solid choice if you want a smartwatch that lasts long without needing frequent charging. Its battery can last up to 11 days in smartwatch mode, which is quite impressive compared to many other smartwatches. This means you can wear it almost all week and still have charge left, which is great for people with busy lifestyles or those who dislike daily charging. The watch uses a Lithium Polymer battery, which tends to be reliable and lightweight. It also has useful power-saving features that help extend battery life based on your activity and settings.

The watch tracks your body’s energy levels, sleep, naps, and stress to give personalized insights, helping you understand how your daily routine affects your battery life and health. This personalized tracking adds value but keep in mind that using many sensors and apps can reduce actual battery life below the 11-day mark if you use GPS or music features frequently. The vívoactive 5 balances bright AMOLED display quality and advanced health monitoring without sacrificing battery life too much.

If you plan to use GPS tracking or music playback a lot, expect the battery to drain faster, meaning you might need to charge it more often. This watch suits users who want a reliable, long-lasting battery with smart health insights and fitness tracking, but heavy GPS or multimedia use will shorten how long it lasts between charges.

The Apple Watch Ultra 2 GPS + Cellular 49mm is crafted for active individuals needing a robust device for various sports and adventures. It boasts impressive battery life, providing up to 36 hours of normal use and extending to 72 hours in Low Power Mode, making it ideal for longer activities and multi-day adventures. This extended battery life is a notable advantage for users who can't charge their devices frequently.

The smartwatch features a rugged titanium case and sapphire front crystal, ensuring durability, perfect for those engaging in outdoor adventures. It includes precision dual-frequency GPS, offering high accuracy for runners, cyclists, and hikers. Additionally, it provides advanced health and fitness metrics, such as heart rate zones and custom workouts, helping users optimize their training.

The cellular capability enhances convenience by allowing communication without a phone nearby, though a mobile service plan is necessary for this feature, possibly adding cost for some users. With its advanced features and robust build, this smartwatch is highly beneficial for fitness enthusiasts and adventure seekers in need of a durable companion with extended battery life.