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Why you Should Not Charge your Smartphone to 100% on a Regular Basis

smartphone battery

To maintain the longevity and health of your smartphone battery, it’s crucial to adopt optimal charging practices. Lithium-ion batteries, which are common power source for smartphones, perform best when they are kept within certain charge levels. Understanding these levels and the consequences of improper charging can significantly enhance your phone’s battery life.

Optimal Charging Levels

The ideal charging range for a lithium-ion battery is between 20% and 80%. Keeping your phone’s battery within this range helps maintain its capacity and prolongs its lifespan. Charging your phone fully to 100% or letting it drain to 0% regularly can negatively impact the battery’s health.

Charging to 100%

Charging your phone to 100% regularly can cause stress on the battery. When a lithium-ion battery is charged to its maximum capacity, it remains in a high voltage state. This high voltage can generate heat, which accelerates the degradation of the battery’s cells. Over time, this practice can reduce the battery’s overall capacity and shorten its lifespan.

Apple, for instance, has introduced optimized battery charging in iOS to help reduce battery aging. This feature slows down the charging process when it reaches 80% and only completes the final 20% when necessary, such as before you wake up if you charge your phone overnight .

Letting the Battery Discharge to 0%

Allowing your phone’s battery to discharge completely to 0% is equally detrimental. Lithium-ion batteries operate most efficiently within a certain charge range. When a battery is completely drained, it can enter a deep discharge state. Repeated deep discharges can lead to the formation of a condition known as “battery memory,” where the battery “forgets” its full capacity, leading to a shorter overall battery life .

Moreover, frequent deep discharges can cause the battery to become unstable and can even lead to potential safety risks, such as swelling or, in extreme cases, explosion.

Best Practices for Battery Health

  1. Avoid Extreme Temperatures: High and low temperatures can damage a lithium-ion battery. Keeping your phone within a moderate temperature range can prevent unnecessary battery wear.
  2. Use Quality Chargers: Using certified chargers and cables ensures that your phone receives the correct voltage and current, protecting it from potential damage caused by substandard charging equipment.
  3. Enable Battery Optimization Features: Many smartphones come with built-in battery optimization settings. These features help manage the charging process to maximize battery health.
  4. Regularly Calibrate Your Battery: To ensure your battery’s charge indicators remain accurate, occasionally let your phone discharge to around 20% and then charge it to 80%.

Proper battery maintenance is critical to ensuring the longevity and efficiency of your smartphone. By avoiding the extremes of fully charging to 100% or allowing the battery to drain to 0%, and instead maintaining a charge level between 20% and 80%, you can significantly extend your battery’s life.

Additionally, adopting best practices like avoiding extreme temperatures, using quality chargers, enabling battery optimization features, and occasionally calibrating your battery can further protect your device.

Understanding these principles not only enhances your phone’s performance but also contributes to a more sustainable use of technology by reducing the frequency of battery replacements.

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