Which Smartwatch Has the Longest Battery Life?

In the age of hyper-connectivity, a smartwatch that needs charging every day can be more of a burden than a convenience. Whether you're an athlete, traveler, or just someone who hates being tethered to a charger—battery life is crucial. So, which smartwatch truly delivers the longest-lasting power?

Why Battery Life Matters

For many users, features like heart rate tracking, GPS, call functions, and AMOLED displays drain battery quickly. That’s why it’s essential to find a watch that balances functionality with efficient power management.

Top Smartwatches with the Longest Battery Life (2025)

1. Amazfit T-Rex Ultra – Up to 20 Days

Built for durability and endurance, the Amazfit T-Rex Ultra is a powerhouse. With its Ultra Battery Saver Mode, you can stretch usage up to 45 days. Perfect for travelers, hikers, and outdoor lovers.

2. Huawei Watch GT 4 – Up to 14 Days

With dual-chip architecture and AI power-saving algorithms, the Huawei GT 4 offers up to 14 days of battery life. It supports Bluetooth calls, SpO₂ monitoring, sleep tracking, and more—without draining fast.

3. Garmin Enduro 2 – Up to 34 Days (With Solar)

If budget isn’t a concern, the Garmin Enduro 2 is a beast. Using Power Glass™ solar charging, it lasts over a month with mixed usage. Ideal for ultra athletes and marathon runners.

4. Kieslect Kr Pro – Up to 13 Days

A mid-budget choice that impresses. It’s got Bluetooth calling, AMOLED display, and still offers 10-13 days of backup, thanks to a smart OS and low consumption sensors.

5. Colmi P71 – Up to 10 Days

Budget-conscious but surprisingly efficient, Colmi P71 offers most smart features—calls, notifications, health tracking—and still lasts around 10 days on a single charge.

How to Maximize Battery Life (Any Smartwatch)

• Turn off always-on display

• Disable continuous heart rate tracking when not needed

• Limit unnecessary app notifications

• Use battery-saver or night modes

• Keep firmware updated

Final Verdict: Who’s the Winner?

If we go purely by numbers, Garmin Enduro 2 and Amazfit T-Rex Ultra win the battery game. But if you need calling features and stylish design, Huawei Watch GT 4 or Kieslect Kr Pro strike a better balance between features and endurance.

So, whether you're after rugged durability or just want to skip nightly charging, there's a smartwatch with a long-lasting battery waiting for you.