Bengt Halvorson  / Green Car Reports »

As Audi has previously emphasized about the E-Tron SUV and E-Tron Sportback, the maximum charging rate isn’t as important as the charging rate that the vehicle can maintain over time. It’s the latter that makes your highway stop predictable.

Other electric vehicles, Audi claims—and it hasn’t said which ones—typically only reach their charging peak power for a short time and then drop to a tapered approach for the rest of the session. If the driver doesn’t plug in for the right portion of the battery’s state of charge (SOC), they miss the fastest charging—or anything close to the claimed miles recovered per 10 minutes.

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