In electric vehicles, this is usually done by switching the drive motor to generator operation and feeding the resulting current into the lithium-ion battery, into which it is stored for later use. For physical reasons, only parts of the braking energy can be recovered. E-vehicles such as the e-Golf have various recuperation modes with which drivers can determine the strength of the braking energy recovery themselves – from maximum deceleration (and recovery) to minimum deceleration with low energy recovery. In long-distance traffic, the recovery effect is lower than in urban and short-distance traffic because the number of braking operations are lower. The smoother the braking process, the higher the proportion of regenerated braking energy.