Abstract: A power unit for powering an electric bike, the power unit comprising: a power supply; a control module connected to the power supply and configured to manage the power output by the power unit; a holder for supporting the power supply and control module; a power connector for connecting the power unit to an electric motor; a control connector for connecting the power unit to an input device; and an attachment device for attaching the power unit to a bike. An electric drive system for a bike, the system comprising: a separable power unit; an electric motor for powering a bike, wherein the electric motor is separably connectable to the power unit by means of the power connector; an input device for communicating data to the power unit; wherein the data is used to manage the power supply of the power unit and the input device is separably connectable to the power unit by means of the control connector.

Abstract: A mount for connecting a power unit to a bike-mounted power apparatus, the mount comprising: an attachment device configured to mechanically connect the mount to a bike, the attachment device being for attaching the mount to the handlebars of a bike; a power unit connector configured to mechanically and electrically connect a power unit to the mount; wherein the power unit connector comprises: an electrical interface configured to electrically connecting to a power unit; and first and second opposing surfaces for gripping a power unit therebetween. A modular power apparatus for a bike includes the mount and a power unit.

Abstract: A power unit for powering an electric bike, the power unit comprising: a power supply; a control module connected to the power supply and configured to manage the power output by the power unit; a holder for supporting the power supply and control module; a power connector for connecting the power unit to an electric motor; a control connector for connecting the power unit to an input device; and an attachment device for attaching the power unit to a bike. An electric drive system for a bike, the system comprising: a separable power unit; an electric motor for powering a bike, wherein the electric motor is separably connectable to the power unit by means of the power connector; an input device for communicating data to the power unit; wherein the data is used to manage the power supply of the power unit and the input device is separably connectable to the power unit by means of the control connector.