How to Fix Slow Charging on Samsung S25

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Slow charging is a common issue among smartphone users, including Samsung Galaxy S25 owners. Whether your phone charges at a crawl or intermittently stops charging, identifying the cause and applying proper solutions can restore fast and efficient charging. AvNexo provides a step-by-step guide on how to fix slow charging on Samsung S25 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.

Why Samsung S25 May Charge Slowly

Several factors can contribute to slow charging:

Faulty or damaged charging cable or adapter
Dust or debris in the charging port
Using a low-power USB port or non-certified charger
Software issues or battery optimization features
Background apps consuming power during charging
Overheating or physical battery issues

Understanding the root cause helps determine the best solution.

Step 1: Use the Original Charger and Cable

The Galaxy S25 is designed for fast charging with Samsung-certified chargers:

Use the original Samsung USB-C cable and adapter.
Avoid third-party chargers that do not support Super Fast Charging or proper wattage.
If you must use a third-party charger, ensure it is USB-PD compatible and rated for 25–45W.

AvNexo Tip: Low-quality cables can limit current flow and significantly slow charging.

Step 2: Inspect and Clean the Charging Port

Dust, lint, or debris can reduce charging efficiency:

Power off your S25.
Inspect the USB-C port using a flashlight.
Use a soft brush or compressed air to gently clean the port.

Avoid inserting metal objects, which can damage the connectors.

Step 3: Close Background Apps and Disable Power-Consuming Features

Charging while running heavy apps or background processes can slow the process:

Close apps using the Recent Apps menu.
Disable features like Bluetooth, GPS, Wi-Fi scanning, and high screen brightness during charging.
Turn on Airplane Mode to reduce energy consumption and speed up charging.

This minimizes power drain while the phone charges.

Step 4: Check Software Updates

Bugs or outdated firmware may affect charging speed:

Go to Settings → Software Update → Download and Install.
Install any available updates, as Samsung frequently releases optimizations for battery and charging performance.

Keeping the system updated ensures efficient power management.

Step 5: Enable Fast Charging

Samsung S25 supports Fast Charging and Super Fast Charging, which may be disabled:

Open Settings → Battery and Device Care → Battery → More Battery Settings.
Enable Fast charging and Super Fast charging.

This ensures the phone draws maximum current for optimal charging speed.

Step 6: Avoid Wireless Charging (If Speed Is Critical)

While convenient, wireless charging is slower than wired fast charging:

Use wired Super Fast Charging for faster results.
Wireless chargers may heat the device, causing the phone to throttle charging speed.

Step 7: Monitor Battery Health

Older or degraded batteries may charge more slowly:

Open Settings → Battery and Device Care → Battery → Battery Health (if available).
If the battery is significantly degraded, consider Samsung-certified replacement.

AvNexo Tip: Always replace the battery at an authorized service center to avoid safety risks.

Step 8: Restart Your Device

A simple restart can fix minor glitches:

Press and hold the Power button.
Select Restart.
After reboot, plug in your charger and check if the speed improves.

Final Thoughts

Slow charging on your Samsung Galaxy S25 is often caused by cables, ports, background apps, or settings. By following AvNexo’ guide — using the original charger, cleaning the port, enabling fast charging, updating software, and monitoring battery health — you can restore optimal charging speed and extend the longevity of your device. Regular maintenance and proper charging habits prevent recurring slow charging issues.