They're able to fit an extra RAV4 Prime's worth of battery capacity in the same space as the original pack. That's impressive. Although with an EPA rating of 222 miles for the current e-tron SUV, it's a lot of miles to squeeze out of the extra 19 kWh in the new battery to get a 300 miles EPA. 30% increase will place it at 288 miles. Perhaps, the Sportback will be the model that hits 300 miles.