Frequent charging of smartphones and laptops to 100% accelerates battery wear, experts at the Cps-Ural service center warn in an interview with UfaTime.ru. Lithium-ion and lithium-polymer batteries used in modern devices are sensitive to extreme charge levels, and improper usage can significantly shorten their lifespan.

How Does This Work?

  1. Critical Charge Zones
  • Battery degradation is highest when charged above 80–90% or discharged below 20%.
  • Constant fluctuations between these extremes accelerate chemical reactions, reducing battery capacity.
  1. Voltage Stress at 100%
  • When a device remains plugged in after reaching 100%, the battery is held at high voltage.
  • This stresses the battery chemically and reduces the number of charge cycles (typically 300–500 full cycles).
  1. Overheating
  • Using a device during charging (e.g., gaming or streaming) increases its temperature.
  • Heat is one of the main drivers of battery degradation.

"A full charge is stressful for the battery — especially if the device stays plugged in," Cps-Ural experts explain.

How to Extend Battery Life

Experts recommend following these rules:

  1. Keep the Charge Between 20–80%
  • Avoid charging to 100% or letting the battery drain below 20%.
  • This reduces chemical stress.
  • For example, plug in your phone at 30% and unplug it at 80%.
  1. Use Smart Charging Features
    Many modern devices include built-in battery optimization tools:
  • Apple: On iPhones (iOS 13+), “Optimized Battery Charging” delays charging past 80% until needed
    (Settings → Battery → Battery Health & Charging).
  • Samsung: One UI includes a charge limit mode that caps charging at 85%
    (Settings → Battery → Battery Protection).
  • Xiaomi: Offers a “Battery Optimization” feature in MIUI.
  • Laptops (Lenovo, Dell, Asus): Often allow you to cap charging at 60–80% via BIOS or proprietary apps.
  1. Avoid Overheating
  • Don’t use your phone for heavy tasks (e.g., games, streaming) while charging.
  • Remove the case during charging to improve heat dissipation.
  • Charge in a cool place, away from sunlight.
  1. Use Quality Chargers
  • Use original or certified adapters (MFi for Apple, USB-IF for Android) to avoid voltage spikes.
  • Fast charging (65W+) is safe if supported by your device, but it can increase heat.
  1. Partial Charging Is Better
  • Short top-ups throughout the day (e.g., 20% at a time) are gentler than a full charge from 0 to 100%.

Battery Facts

  • Charge Cycles: Lithium-ion batteries typically last 300–500 full cycles (0 to 100%).
    Staying between 20–80% extends this, sometimes over multiple days per cycle.
  • Capacity Loss: Even with good care, batteries lose 15–20% capacity after 2–3 years.
    Charging to 100% accelerates this loss.
  • Ideal Temperature: Batteries last longest at 15–25°C.
    At 40°C, degradation doubles.

When to Replace the Battery

If your phone loses charge faster or shuts off around 20–30%, it’s likely worn out. Check battery health:

  • iPhone: Go to Settings → Battery → Battery Health & Charging
    (Consider replacement below 80% health)
  • Android: Use apps like AccuBattery, or diagnostic codes like ##4636## on some models.

Battery replacement at a service center costs $20–100 and can restore your phone’s battery life.