(JP9286381-A)      The bicycle (2) has an electric motor, and tubular frame (4) comprising front part (6) connected with the front wheel (20), seat part (12) connected with saddle (30) and a main part (8) connected to the others (6,12) and with seat strut (14) and chain strut (16).    A frame cover (58) is provided, which is protected at the main part, and a recess is arranged for the reception of a battery unit (52) with batteries (54). A measuring unit (64) for the residual capacity of the battery, is mounted centrally at the frame cover, at a position between the front tube part and the recess, and an indicating unit (66). A computer and a fault diagnostic unit can be provided.    ADVANTAGE -   Remaining battery capacity can be indicated whilst the engine is running or stopped. Fault diagnosis can be carried out by rider or by service personnel.    (JP10014116-A)      The bicycle (2) has an electric motor, and tubular frame (4) comprising front part (6) connected with the front wheel (20), seat part (12) connected with saddle (30) and a main part (8) connected to the others (6,12) and with seat strut (14) and chain strut (16).    A frame cover (58) is provided, which is protected at the main part, and a recess is arranged for the reception of a battery unit (52) with batteries (54). A measuring unit (64) for the residual capacity of the battery, is mounted centrally at the frame cover, at a position between the front tube part and the recess, and an indicating unit (66). A computer and a fault diagnostic unit can be provided.    ADVANTAGE -   Remaining battery capacity can be indicated whilst the engine is running or stopped. Fault diagnosis can be carried out by rider or by service personnel.    (JP10104326-A)      The bicycle (2) has an electric motor, and tubular frame (4) comprising front part (6) connected with the front wheel (20), seat part (12) connected with saddle (30) and a main part (8) connected to the others (6,12) and with seat strut (14) and chain strut (16).    A frame cover (58) is provided, which is protected at the main part, and a recess is arranged for the reception of a battery unit (52) with batteries (54). A measuring unit (64) for the residual capacity of the battery, is mounted centrally at the frame cover, at a position between the front tube part and the recess, and an indicating unit (66). A computer and a fault diagnostic unit can be provided.    ADVANTAGE -   Remaining battery capacity can be indicated whilst the engine is running or stopped. Fault diagnosis can be carried out by rider or by service personnel.    (US5798702-A)      The bicycle (2) has an electric motor, and tubular frame (4) comprising front part (6) connected with the front wheel (20), seat part (12) connected with saddle (30) and a main part (8) connected to the others (6,12) and with seat strut (14) and chain strut (16).    A frame cover (58) is provided, which is protected at the main part, and a recess is arranged for the reception of a battery unit (52) with batteries (54). A measuring unit (64) for the residual capacity of the battery, is mounted centrally at the frame cover, at a position between the front tube part and the recess, and an indicating unit (66). A computer and a fault diagnostic unit can be provided.    ADVANTAGE -   Remaining battery capacity can be indicated whilst the engine is running or stopped. Fault diagnosis can be carried out by rider or by service personnel.    (DE19640248-C2)      The bicycle (2) has an electric motor, and tubular frame (4) comprising front part (6) connected with the front wheel (20), seat part (12) connected with saddle (30) and a main part (8) connected to the others (6,12) and with seat strut (14) and chain strut (16).    A frame cover (58) is provided, which is protected at the main part, and a recess is arranged for the reception of a battery unit (52) with batteries (54). A measuring unit (64) for the residual capacity of the battery, is mounted centrally at the frame cover, at a position between the front tube part and the recess, and an indicating unit (66). A computer and a fault diagnostic unit can be provided.    ADVANTAGE -   Remaining battery capacity can be indicated whilst the engine is running or stopped. Fault diagnosis can be carried out by rider or by service personnel.