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A comment on Tesla’s promises don’t compute with current physics and economics of batteries. Parent comment

Re:Tesla’s promises don’t compute with current physics and e... by bogomipz on Saturday November 25, 2017 @11:57AM (#15776698)
>"The Tesla superchargers currently charge at around 2% a minute up until about 80% which is 40 minutes to hit 80%."

I am curious what exactly happens at 80%, does that 2% a minute rate drop off precipitously? If so what is the reason for that?

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Re:Tesla’s promises don’t compute with current physics and e... by flyingspork on Monday November 27, 2017 @01:18PM (#15789624)
Lithium Ion batteries are generally charged using a two step process of constant current then constant voltage. https://www.digikey.com/en/articles/techzone/2012/nov/consta... If 80% is the set point to switch over from constant-current to constant-voltage, then yes, the charge rate will drop continuously until it reaches full charge.
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