What is the function of a "range extender" in electric vehicles?

A range extender serves a crucial role in electric vehicles by incorporating a small auxiliary engine designed specifically to generate electricity. This engine functions as a power source to recharge the vehicle's battery while driving, effectively extending the overall range of the vehicle. When the battery charge is running low, the range extender activates to supply additional energy, enabling the vehicle to continue operating without the immediate need for a charging station. This technology particularly enhances the usability of electric vehicles in scenarios where charging infrastructure may be limited or for longer trips, providing drivers with added peace of mind regarding range anxiety.

The other options do not encapsulate the primary function of a range extender. Increasing battery life involves different technologies, while improvements in aerodynamics or faster charging times relate to vehicle design and electrical systems rather than the core function of a range extender.