ISO/TS 19466:2017 specifies test procedures for measuring performance of regenerative braking systems used for electric motorcycles and mopeds that are propelled by traction motors with electric batteries. Performance of regenerative braking systems is dealt with two perspectives: first, how much a regenerative braking system can extend range of a motorcycle or moped or reduce energy consumption, and second, the efficiency of the driving motor system when working as generator in regenerative braking mode.