Explainers & Education · Oct 14, 2026

Why does fast charging slow down near full?

Why does fast charging slow down near full? by Mark Lundeberg. Watch the explainers & education video and visit the original X post.

Mark Lundeberg@MarkLundeberg
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Why does fast charging slow down near full? Opus and I built an open-source physics simulator, driftlet. This is the kind of explainer it’s for: a battery simulated live in your browser, every picture computed from the physics, not drawn.
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The prompt behind it.

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Video and prompt by Mark Lundeberg. Original post ↗