Abstract: An engagement unit for co-operation with an attachment unit in a docking and recharging system for a power assisted personal mobility vehicle having a battery accumulating electronic power to be supplied to an electric motor is provided. The engagement unit includes a first electric terminal module configured to establish an electrical connection with a second electric terminal module provided at the attachment unit; a locking means configured to secure the attachment unit when the attachment unit is in a lockable position and an actuation means of the attachment unit is fully engaged with the engagement unit; and a control module configured to receive an identification signal from an identification means provided in the attachment unit. Moreover, the attachment unit for co-operation with the engagement unit includes the second electric terminal module configured to establish the electrical connection with the first electric terminal module provided at the attachment unit.