Abstract: A management method for the energy range of a rechargeable battery pack of an assisted pedal electrical bicycle (1) including an electrical machine controllable for supplying a torque according to a pedal assistance factor, said torque being summed to the one generated by a cyclist through the pedaling, the management method including the following steps: a) selecting a route to be traveled by the electrical bicycle (1) starting from an initial position; b) obtaining data representative of the altitude profile of the selected route and dividing the route in a plurality of segments each being characterized by a respective altitude parameter; c) calculating a value correlated to the maximum percentage of battery pack (20) discharge on the selected route as a function of the altitude profile and of a limit pedal assistance factor K_limit, preferably calculating a value for each segment representative of the percentage of battery pack (20) discharge on the segment as a function of a limit assistance factor K_limi