Smartwatches met een lange batterijduur

Heading out for the day or on a long adventure? The last thing you want is your smartwatch dying halfway through. That’s why choosing a smartwatch with a long-lasting battery is essential. We’ve rounded up three of the best options for you below!

1. Amazfit GTR 3

The Amazfit GTR 3 is built for fitness enthusiasts who want more than just basic activity tracking. It’s lightweight, stylish, and offers plenty of smart health and workout features for a very reasonable price.

Battery Life

Under normal use, the Amazfit GTR 3 offers up to 21 days of battery life. Heavy users can expect around 10 days. The difference mainly depends on how often features like GPS, animated watch faces, heart rate monitoring, and the always-on display are used. With continuous GPS, the watch lasts about 35 hours, and in battery saver mode, it can go up to 35 days. Charging from empty takes roughly 2 hours.

Health and Fitness Tracking

The Amazfit GTR 3 includes advanced health-tracking options such as sleep analysis, stress monitoring, and menstrual tracking. Using the Zepp app, you can view detailed reports and trends to help improve your well-being.

Design

With a clean, classic design and a slim aluminium case, the Amazfit GTR 3 looks great on both men and women. However, it’s not the most rugged smartwatch — so consider adding protection with one of our Amazfit GTR 3 accessories.

Available from around £95.

2. Garmin Fenix 6 Pro

The Garmin Fenix 6 Pro is made for serious athletes who want detailed performance data and durable build quality. It’s perfect for hiking, running, or triathlon training.

Battery Life

The Fenix 6 Pro is one of the most power-efficient watches you can buy. In Expedition Mode, it lasts up to 46 days on a single charge. In standard smartwatch mode, you’ll get around 14 days. In Max Battery GPS Mode, it can run for up to 72 hours, while the regular GPS mode offers about 36 hours. The watch uses an LCD display (rather than OLED), helping save power. A full charge takes roughly 1 hour.

Performance and Features

The Fenix 6 Pro features Garmin’s GLONASS + GPS tracking for highly accurate location data. It also includes PacePro — a smart pacing tool that helps you stay on track with your target speed. You can store music directly on the watch and connect Bluetooth headphones for phone-free workouts.

Need a style refresh or replacement strap? Check out our Garmin Fenix 6X Pro bands collection.

Available from around £329.99.

3. Apple Watch Ultra

The Apple Watch Ultra is built for extreme performance and endurance. With a 49mm titanium case, it’s tough enough for outdoor sports and diving, yet stylish enough for everyday wear.

Battery Life

The Apple Watch Ultra delivers a significant upgrade over previous Apple Watch models. It lasts up to 36 hours in standard mode and up to 60 hours in Low Power (Multi-Day Adventure) mode. With LTE enabled, expect around 18 hours of battery life. For workouts, Apple claims:

• Up to 18 hours of indoor training
• Up to 17 hours of outdoor multisport workouts with GPS and LTE in Low Power Mode
• Up to 12 hours with GPS only
• Up to 10 hours with GPS and LTE

Charging times are approximately 1.5 hours to 80% and 2.5 hours to full charge.

Smart Features

The Ultra is more than a fitness tracker — it’s a full extension of your iPhone. You can answer calls, send messages, or use the Walkie-Talkie app without needing your phone nearby.

Three-Microphone System

It features three microphones that automatically adjust to wind direction for clearer voice calls in all weather conditions.

Oceanic+ App

Perfect for divers, the Oceanic+ app automatically displays real-time data while underwater — no need to press buttons or switch screens manually.

Want to switch up your look? Explore our wide range of Apple Watch straps for every style and occasion.

Available from around £849.

Frequently Asked Questions

Why does my Apple Watch battery drain so quickly?

This usually happens when multiple features like LTE, Bluetooth, GPS, and the always-on display are active. Check out our guide on why your Apple Watch battery drains fast and how to extend it.