A regular, non plug-in Prius wont go much further on battery alone. I'm a little surprised that this one, described as a 'mild hybrid' will run on battery at all.
The usual description on a mild hybrid is 24 or 48V battery powering a motor linked to the end of the crank via a belt. It's there to provide assistance in overcoming inertia when setting off, and you don't feel the effects as a driver.
But it does allow a manufacturer to class it as a hybrid...
You need to read the article again.
The mild hybrid Qashqai does not have the ability to run on the battery, no mild hybrid does, all the technology does is make the stop/start work better and enable the cars to coast to a halt rather tan waiting for the car to stop before killing the engine. If you want a proper non-plug in hybrid that is the territory of Toyotas and the Hyundai Iconic base model.
Its the e-power model available from next year that has the ability to run a very short distance on the battery alone.
For the record the RAV4 I tested back in October was quite willing to kill the petrol engine at reasonable speeds (up to 70 mph) on downhill sections and even flat roads. I believe the battery was 1.3 KwH which in theory gave an electric range in town of about 2 miles with 100% charge.
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