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the claim
Smartphone fast charging slows as the battery fills to limit heat and battery degradation.
the verdict
INSUFFICIENT LEANING
Recorded sources
6 sources for · 0 against
Is it true that smartphone fast charging slows as the battery fills to limit heat and battery degradation?
Unclear. Several battery-engineering sources partially support the general link between fast charging, heat, and battery degradation, but none addresses smartphone charging tapering as the battery fills.
Verdict: PARTIAL LEAN · 6 sources for, 0 against · Last checked
Evidence for · 6
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Thornton, J. & Kollmeyer, P. J. (2026). Heat Generation and Fast Charging Characteristics of Automotive LFP, NMC, and NCA Battery Cells. doi.org. https://doi.org/10.2139/ssrn.7466288
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More for · 5
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Does never charging a laptop battery to more than 80% capacity increase its lifespan?. (2012). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/11184/does-never-charging-a-laptop-battery-to-more-than-80-capacity-increase-its-life
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Botsford, C. & Szczepanek, A. (2009). Fast Charging vs. Slow Charging: Pros and cons for the New Age of Electric Vehicles. zenodo.org. https://doi.org/10.5281/zenodo.8049282
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Hui, F. L., Izuan, F. R. M., & Rosemizi, A. R. (2024). Development of an advanced current mode charging control strategy system for electric vehicle batteries. zenodo.org. https://doi.org/10.11591/ijpeds.v15.i4.pp2639-2650
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Examining Model-Based Fast-Charging and Preconditioning on a Vehicle-Level - Simulation Data. (2026). data.europa.eu. https://data.europa.eu/data/datasets/https-open-bydata-de-api-hub-repo-datasets-https-mediatum-ub-tum-de-1750774
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Bouzaid, S., Mehdi, L. E., & Ballouti, A. E. (2024). A fast charge algorithm for Li-ion battery for electric vehicles. zenodo.org. https://doi.org/10.11591/ijece.v14i3.pp2457-2465
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