Can Phone Cases Cause Overheating? The Real Answer and What to Avoid
Why This Question Keeps Coming Up
If you've ever felt your phone getting warm, especially during charging or heavy use, you're not alone. But can a phone case make it worse? It's a common question — and one worth unpacking.
Yes, Some Cases Can Trap Heat — But Not All
Thick, poorly ventilated cases with non-breathable materials can restrict airflow and trap heat. This is especially true for cases that wrap tightly around all surfaces without spacing or insulation.
The result? Reduced device performance and shorter battery life over time.
How ASSUI Designs Around Heat
At ASSUI, we design cases with your phone’s real-world use in mind — and that includes thermal performance. Here's how our cases prevent overheating:
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Slim, contoured structure that doesn’t block air circulation
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Dual-layer protection with thermal resistance built into the material blend
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No excess coverage over internal heat zones like the battery core
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Full MagSafe compatibility without heat buildup during wireless charging
Everyday Tips to Avoid Overheating
Even with a well-designed case, it's smart to avoid:
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Using your phone in direct sun for extended periods
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Leaving it inside hot cars
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Charging under thick blankets or pillows
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Playing high-performance games while charging
Protection That Works With Your Phone — Not Against It
A quality case should guard your phone — without interfering with how it functions.
ASSUI balances protection and breathability to keep your phone cool, safe, and stylish — no compromises.