How do I cool down my phone while mining Monero?

The quickest way to cool your phone is to stop mining, unplug it if it is charging, and let it rest somewhere cool and shaded. If you try again, reduce the mining workload and take breaks—but if your phone stays hot, mining on it is not worth risking the battery.

Cool it down safely first

Pause the miner or close its browser tab. Lock the screen and leave the phone alone until it feels close to its usual temperature.

To help heat escape:

• Remove a thick case, if you can do so safely.
• Put the phone on a hard, dry surface with air around it.
• Move it out of sunlight and away from heaters.
• Use a gentle fan blowing room-temperature air across it.
• Stop other demanding tasks, such as games, video calls, or navigation.

Do not put your phone in a fridge or freezer, press ice against it, or wrap it in a wet towel. Sudden cooling can cause condensation—water forming inside or around the phone—which can damage it.

If a temperature warning appears, stop using the phone and follow its on-screen instructions. Do not restart mining as soon as the warning disappears; give it time to cool fully.

Reduce the work before restarting

Monero’s mining method, called RandomX, favors CPUs—the processors that do general computing work. Mining keeps those processors busy for long periods. A phone’s small body has limited room to release that heat.

If your browser miner provides controls, start with its lowest workload:

• Reduce threads. A thread is one stream of processing work. Try one thread first.
• Lower CPU usage or intensity. These settings may reduce how continuously the processor works, although the exact behavior depends on the miner.
• Use short sessions. Stop if heat keeps building rather than waiting for a warning.
• Keep the screen off or dim, if the miner supports it. Some browsers pause mining when the screen locks; do not bypass that behavior just to keep mining.

A lower mining speed is an acceptable trade-off. Do not disable the phone’s heat protections or force higher processor speeds.

Avoid charging and mining together

Charging adds heat, especially with fast charging or wireless charging. Running a miner at the same time can make cooling much harder.

For a brief test, use the battery rather than charging while mining. Do not treat repeated battery drain-and-recharge cycles as a long-term solution, though: they also contribute to battery wear.

Never mine with the phone under a pillow, on bedding, in a pocket, or inside a bag. Avoid leaving it mining unattended or overnight.

There is no single safe temperature for every phone. Follow your manufacturer’s guidance, and remember that the outside temperature does not tell you exactly how hot the battery or processor is.

Know when cooling is not enough

Stop mining if your phone repeatedly dims its screen, slows down sharply, pauses charging, or shuts itself off. These can be signs of heat protection taking over.

If you notice swelling, a lifting screen, or an unusual smell, stop using and charging the device. Seek qualified repair advice; do not press or puncture the battery.

The bottom line

Stop the workload first, then use shade, airflow, and time to cool your phone. If even low-intensity mining makes it persistently hot, stop mining on that device. Phone mining usually offers very small returns, and cooling cannot remove the risk of battery wear.