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How much do electric car batteries degrade?

Many electric cars will still have more than 80% of their initial capacity after 200,000 miles.

Pessimism about battery longevity is giving us all cheaper second-hand EVs, which is a nice perk for now, but not great if we want to see a widespread shift from petrol to electric. Lithium-ion batteries have a thin layer called the SEI (Solid Electrolyte Interphase) that forms on the anode surface. A study published in Nature Energy also found that under “real” driving conditions, batteries lasted around 38% longer compared to laboratory tests.

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