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How Long Does Samsung Galaxy Watch 4 Battery Last?

The Galaxy Watch 4 typically lasts 18-24 hours on a full charge depending on your model size and usage patterns. The 44mm model has a larger 361mAh battery compared to the 40mm's 247mAh, providing roughly 30-40% longer battery life.

Typical Battery Life by Model​

Battery life varies based on how you use your watch throughout the day.

Usage Level40mm Model44mm Model
LightUp to 24 hoursUp to 30 hours
Typical18-20 hours20-24 hours
Heavy12-15 hours15-18 hours

  • Light Usage: Always-On Display disabled, basic notifications, no GPS workouts, standard health monitoring.

  • Typical Usage: Always-On Display enabled, continuous heart rate, 30-60 minutes of GPS tracking, regular notifications, sleep tracking.

  • Heavy Usage: Always-On Display on, multiple GPS workouts, music streaming, LTE active (LTE models), continuous SpO2 monitoring.

What Drains Battery Fastest​

Understanding power consumption helps you make trade-offs based on your priorities.

  • GPS Tracking: 8-12% per hour of active outdoor workout tracking. Indoor workouts without GPS use only 3-5% per hour.

  • Always-On Display: Adds 15-20% to daily battery drain. Disabling it is the single most effective way to extend battery life.

  • LTE Connectivity: Using cellular instead of Bluetooth connection drains 20-30% faster. Use LTE only when you need to leave your phone behind.

  • Screen Brightness: Higher brightness levels significantly impact battery. Reducing to 40-50% saves 10-15% daily.

Extending Battery Life​

Adjust settings to get more hours between charges.

  1. Disable Always-On Display: Settings Display Always-On Display Off

  2. Reduce brightness: Settings Display Brightness and lower to 40-50%

  3. Limit health monitoring: Open Samsung Health settings and disable continuous heart rate and SpO2 when not needed

  4. Enable Power Saving Mode: Settings Battery Power saving extends battery 30-50% by limiting background activity

  5. Use simple watch faces with dark backgrounds and minimal complications

Charging Time​

Both models charge relatively quickly using the included wireless charger.

  • 40mm Model: Approximately 90 minutes for a full charge (0-100%)

  • 44mm Model: Approximately 120 minutes for a full charge (0-100%)

  • Quick Top-Up: 30 minutes of charging provides roughly 40% battery

Most users charge during their morning routine or evening downtime. Partial charging is fine for battery health—you don't need to reach 100% every time.

See Also: Battery Drain Solutions|How to Track Sleep

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