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La Croix can improves iPhone 18 Pro sustained performance by 25% in thermal throttling test

🔄 Updated 1h ago
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Key points

  • iPhone 18 Pro thermal throttles under sustained load.
  • Cold La Croix can used as external cooling.
  • Sustained performance improved by 25%.
  • Initial peak speed was slightly lower with cooling.

Thermal Throttling Observed in iPhone 18 Pro

Developer Matt Birchler observed thermal throttling in the Apple iPhone 18 Pro during benchmarking. The A20 Pro processor initially achieved 447.9 words per second in a transcription test but settled to around 320 words per second after prolonged runs. This performance reduction is a common mechanism in portable devices to prevent overheating and component damage.

Improvised Cooling Method Applied

To address the thermal throttling, Birchler placed a cold can of La Croix sparkling water on the back of the iPhone 18 Pro during a 20-run benchmarking session. This method was based on his prior experience that cold beverages can quickly cool down phones.

Performance Improvement Documented

With the external cooling, the iPhone 18 Pro achieved an average sustained performance of 400.4 words per second, despite a slightly lower initial peak of 429.5 words per second. This represents approximately a 25% increase in sustained performance compared to the uncooled runs. The test indicates that even a simple cooling solution can significantly impact performance under heavy, continuous workloads.

Implications for Heavy Device Users

While most users may not require such cooling for daily tasks, those who engage in extensive activities like mobile gaming, video editing, or prolonged photo capture might experience performance benefits from mitigating thermal throttling. Specialized gaming phones sometimes include integrated liquid cooling, but this test shows an accessible, albeit unconventional, method for other devices.

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Reporting from

A tech enthusiast used a cold can of La Croix sparkling water to cool an iPhone 18 Pro during benchmarking, resulting in a 25% improvement in sustained performance. This demonstrates how external cooling can mitigate thermal throttling in mobile devices under heavy loads. The test shows that even simple methods can impact device performance during prolonged use.