I'm just thinking about putting a small standard 12V battery in the front trunk, and connect it in parallel to the dying or dead vehicle battery, to e. g. bridge the time until getting a replacement. Has someone experience in doing so or any theoretical or practical objections?
It will depend on the glide angle if the car maintains speed or even accelerates when you keep the meter centered. Due to the charging losses during recuperation, the most efficient way to drive downhill is keeping the meter centered until reaching your desired speed or a given speed limit. And...
When driving my 2018 i3 94A at low speed sometimes a flap - flap noise, like this from a wheel of fortune, occurs. The noise is relatively silent and usually masked by the pedestrian protection sound generator and/or ventilation noise. With radio on you will never hear it. So I could imagine...