Released in 2018, the Series 4 is now several years old, andApple Watch Series 4 Battery aging is a common phenomenon in Apple Watch Series 4 devices.
Aging Factors:
Chemical Age: This is the most significant factor. Even with minimal use, battery capacity will naturally decrease over time.
Charge Cycles: A complete charge-discharge cycle reduces capacity. The Series 4’s battery is designed to retain up to 80% of its original capacity after approximately 500 full charge cycles.
Usage Habits: Prolonged use or storage in extreme temperatures (too high or too low) accelerates aging.Apple Watch Series 4 Battery
Maintenance and Optimization Recommendations:
Update System: Ensure watchOS is up to the latest version. Apple typically includes battery management optimizations.
Enable “Optimize Charge Limit” (if prompted): The watch learns your charging habits and delays charging above 100%, reducing the time the battery spends at full charge and thus slowing aging.
Avoid Extreme Temperatures: Especially avoid prolonged charging or use in high temperatures (such as inside a car under direct sunlight).
Use Power Saving Mode Mode Appropriately: When the battery is extremely low and cannot be charged, you can temporarily useApple Watch Series 4 BatteryPower Saving Mode” to extend usage time.
Normal Use, No Excessive Maintenance Required: Modern lithium-ion batteries do not require complete discharge and recharging; charge whenever needed.
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