State of health/ charge
Discussion
I think most people buying these at this age are just going by the fact that the battery will be under warranty for a good while yet (I believe 7 years and 100k miles like the rest of the car), and as said there aren't many reported issues, so aren't worrying about battery health too much. Even the Kia dealer I asked about an approved used e-Niro didn't have anything to offer in terms of checking the battery health.
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