How To Fix Galaxy S25 Overheating While Charging (2026)
If your Galaxy S25 gets hot while charging, especially after a software update, unplug it and let it cool before you test anything else.
Heat during charging usually comes from the charger, the cable, heavy background activity, or the phone’s own settings rather than a failed battery.
This guide goes through the fixes in order, using Samsung’s own support guidance, and most take under five minutes.
Quick answer: what to try first when the S25 overheats on the charger
| Step | Fix | Where | Risk to data |
|---|---|---|---|
| 1 | Unplug and cool down | Remove case, move to a cool room | None |
| 2 | Swap charger and cable | Samsung or certified accessories | None |
| 3 | Check Fast charging | Settings > Battery > Charging settings | None |
| 4 | Try Battery protection | Settings > Battery > Battery protection | None |
| 5 | Install updates | Settings > Software update | None |
| 6 | Reset all settings | Settings > General management > Reset | Settings only |
Why does the Galaxy S25 get hot while charging?
Samsung lists several causes of heat on Galaxy phones, and many apply to charging.
- Charger and cable: a damaged, non-genuine or third-party charger, cable or connector can heat the phone.
- Dirt or liquid in the port: contamination in the connector can cause heat.
- Heavy use during charging: gaming, streaming, video calls and large downloads add heat on top of charging.
- Setup and restore: initial setup, data restoration and file transfers keep the processor busy.
- Environment: direct sunlight, bedding, bags and pockets trap heat.
Samsung’s support pages do not give a temperature threshold for normal versus abnormal heat.
Fix 1: stop charging and let the phone cool
Samsung’s advice is to unplug the charger, close running apps, let the phone cool, and then charge again.
- Unplug the Galaxy S25 from the charger.
- Remove the case if it traps heat.
- Move the phone to a cool place out of direct sunlight.
- Close heavy apps before you plug it back in.
Charging speed can drop when the phone or charger gets hot, so cooling also helps charging work properly.
Fix 2: use the right charger and cable
An incompatible or damaged cable can heat the charging port, so try a different compatible Samsung charger and USB cable.
| Model | Max wired speed | Samsung’s name |
|---|---|---|
| Galaxy S25 | Up to 25W | Super Fast Charging |
| Galaxy S25+ | Up to 45W | Super Fast Charging 2.0 |
| Galaxy S25 Ultra | Up to 45W | Super Fast Charging 2.0 |
Samsung’s charging guidance says Super Fast Charging 2.0 uses a 45W or 60W USB-C adapter with a 5A-rated USB-C cable.
It also says Super Fast Charging at 25W uses a 25W USB-C adapter, and that Samsung recommends genuine or certified accessories.
Charge from a wall outlet rather than a PC or standard USB port, since fast charging does not activate on those.
Fix 3: check the USB-C port
Dust, lint or moisture in the port can cause heat.
- Power the phone off.
- Look into the port with a flashlight.
- Remove lint or debris without metal objects or liquids.
If you see a moisture notification, gently shake the phone, wipe it with a soft cloth, and let it air-dry until the port is completely dry before charging.
Fix 4: check the Fast charging setting
Turning fast charging off for a test shows whether the extra heat comes from high-speed charging.
- Go to Settings > Battery > Charging settings.
- Turn Fast charging off and charge again.
- Turn it back on afterward if you want full speed.
On Galaxy S23 series and later, Samsung combines Fast charging and Super fast charging under one Fast charging toggle.
Keeping the screen off while charging also helps both speed and heat.
Fix 5: try Battery protection
Battery protection stops charging early or caps the charge level, which means less time spent at full power.
- Go to Settings > Battery > Battery protection and turn it on.
- Pick Maximum if you want a limit of 80, 85, 90 or 95 percent.
Samsung says choosing a limit requires One UI 7.0 or later, and menu names can vary by software version.
Fix 6: reduce background activity
Samsung’s heat guide suggests limiting background use so the processor stays cooler.
- Go to Settings > Device care > Optimise now (or Optimize now).
- Go to Settings > Device care > Battery and turn on Power saving.
- Tap Background usage limits and turn on Put unused apps to sleep.
Restart the phone afterward and charge with the screen off.
Fix 7: install pending updates
Updates can change how the phone manages power and temperature, and reports in July 2026 linked S25 overheating to a recent One UI update.
- Go to Settings > Software update and install any available update.
- Update your apps in the Play Store and Galaxy Store.
- Restart and test charging again.
Samsung has not publicly confirmed a specific bug, per that report, and one outlet warns against rolling back firmware because it can trip the Knox warranty flag and cause data loss.
Fix 8: reset all settings
This restores system settings to default without deleting apps or personal data.
- Go to Settings > General management > Reset.
- Tap Reset all settings, then Reset settings, then Reset to confirm.
Samsung says this keeps your apps, personal data, security and language settings, and accounts.
Run Samsung Members diagnostics
Samsung Members can check battery status and charging hardware.
- Open the Samsung Members app and use Phone Diagnostics to check the battery.
- In Support, run the full diagnostics and pick Cable charging to test the cable.
Which fix matches your symptom?
| Symptom | Likely cause | Try |
|---|---|---|
| Hot only with one charger | Charger or cable | Fix 2 |
| Hot while gaming or streaming on the charger | Heavy use | Fix 1 and 6 |
| Hot with moisture or lint warning | Port contamination | Fix 3 |
| Started right after an update | Software | Fix 7 |
| Hot with every charger and no heavy use | Possible hardware fault | Contact Samsung |
When should you contact Samsung?
If the phone still overheats with several chargers after these steps, Samsung recommends contacting support or a service center.
On Samsung’s Latin America support page, batteries carry a one-year warranty, and a confirmed manufacturing defect inside that period is repaired or replaced at no cost, so check your own region’s terms.