Marques Brownlee
February 6, 2026 · 3 min read
The Problem with these Smartphone Batteries
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Key Takeaways
- 1We're living in a world where phones can pack 10,000 mAh batteries while staying thinner than ever before, all thanks to silicon carbon battery tec...
- 2Silicon carbon batteries achieve their superior performance by replacing graphite with silicon, which can hold significantly more energy.
- 3The initial theory for why major companies weren't adopting silicon carbon was supply chain limitations - perhaps manufacturers couldn't produce th...
- 4The real issue lies in the fundamental physics of silicon carbon batteries.
- 5To manage this expansion, silicon is finely ground rather than used in solid blocks, and carbon is added specifically to absorb the expansion forces.
Overview
We're living in a world where phones can pack 10,000 mAh batteries while staying thinner than ever before, all thanks to silicon carbon battery technology. Yet despite these impressive capabilities, major smartphone manufacturers like Apple, Samsung, and Google continue to avoid this seemingly revolutionary tech.
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