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Mobile

Understanding the thermal ceiling in portable power

Source: mitTechReview September 9, 2026 · 01:18
Understanding the thermal ceiling in portable power
From the publisher
Plug a phone into a modern charger and the first 10 minutes are impressive. The next 20 are not. This is not a defect. It’s the connected device protecting itself. As temperature rises during charging, a smartphone’s battery management system reduces the current it will accept, because heat accelerates the chemical degradation that permanently reduces…
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