External cooling can reduce a reported 40°C phone temperature to about 24–25°C during demanding use, but that does not prove longer battery life. A 43° app reading or 120 FPS...
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If your laptop jumps from 89°C to 72°C with a high-pressure pad, the purchase can make sense; if a cheap open fan only moves 1-2°C, a riser may be smarter....
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