How to Calibrate Samsung S25 Battery

 The Samsung Galaxy S25 is equipped with a powerful and intelligent battery management system that ensures accurate power readings and long-lasting performance. However, over time, users may notice the battery percentage dropping rapidly or showing inaccurate readings — such as jumping from 30% to 10% or shutting down before reaching 0%. When this happens, it’s time to calibrate your Samsung S25 battery.

OnePlus explains exactly how to do it safely and effectively.

Did you know? For a complete guide on this topic, check out the Samsung Learning Hub and explore related tips in the Battery & Power Topic Hub.

What Is Battery Calibration?

Battery calibration is the process of syncing the phone’s software-based power meter with the actual battery capacity.
Modern Android devices like the Galaxy S25 rely on internal sensors to estimate battery percentage, but these readings can drift over time due to software updates, incomplete charges, or irregular charging habits.

Calibration does not fix degraded battery cells — it only helps the software show accurate battery levels. Think of it as “retraining” the phone to correctly interpret remaining charge.

When Should You Calibrate the Battery?

You should consider calibration if you notice:

  • Battery percentage drops suddenly or behaves inconsistently.

  • The phone turns off even though it shows charge remaining.

  • The battery indicator doesn’t reach 100% even after a full charge.

  • After a major software update or factory reset.

If you experience these symptoms, calibration can help restore accurate readings and optimize battery reporting.

Step-by-Step Guide: How to Calibrate Samsung S25 Battery

Step 1: Fully Discharge the Battery

Use your phone normally until it shuts down automatically due to low battery.

  • Don’t restart it.

  • Wait at least 30 minutes after it powers off to ensure all residual charge drains completely.

Step 2: Fully Charge the Battery to 100%

  • Plug in the original Samsung charger and cable.

  • Keep the phone powered off while charging.

  • Allow it to reach 100%, then leave it connected for another 30–60 minutes to ensure a complete charge cycle.

This helps the phone register the true “full charge” level.

Step 3: Turn On the Device

Once charged, power on your Samsung S25 and check if it shows 100%. If not, leave it plugged in until it does.

Step 4: Use and Recharge Normally

Use your phone normally until it reaches about 5–10%, then charge it again up to 100% without interruption.
This reinforces the new battery calibration profile in your system.

Optional: Use Battery and Device Care

Samsung includes a helpful feature that can improve calibration accuracy.

  1. Go to Settings → Battery and Device Care → Battery.

  2. Tap Optimize Now to clear background processes and refresh system data.

  3. Check for updates under Software Update to ensure optimal battery performance.

Important Tips from OnePlus

  • Avoid frequent full discharges. It’s fine occasionally for calibration, but doing it regularly stresses lithium-ion cells.

  • Use genuine chargers. Cheap third-party adapters can deliver inconsistent voltage and confuse the battery sensor.

  • Don’t overcharge. Keeping the device plugged in for long periods at 100% may shorten lifespan.

  • Enable “Protect Battery.” Go to Settings → Battery → More Battery Settings → Protect Battery to limit maximum charge to 85% for long-term health.

Final Thoughts

Battery calibration is a simple but powerful way to improve the accuracy of your Galaxy S25’s power readings. It ensures that the displayed battery percentage reflects your phone’s actual charge, helping you avoid sudden shutdowns or misleading indicators.

By following OnePlus’ professional guide on how to calibrate the Samsung S25 battery, you can maintain both performance accuracy and battery health — ensuring your device stays reliable day after day.

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