A power driven vehicle used by at least partially disabled persons for mobility, the vehicle comprising: - a frame (202, 302) having a front frame (221, 321) and a rear frame (222, 322) that are detachably and pivotally connected together, said front frame (221, 321) comprising means for receiving at least one steerable wheel and a steering mechanism and means (207a, 307a) for receiving a seat, and said rear frame (222, 322) comprising means (226a, 226b) for receiving at least two drive wheels, - at least one steerable wheel, a steering mechanism and a seat connected to said front frame (221,321), - at least two drive wheels pivotally connected to said rear frame (222, 322) via a single axle, - an electric motor mounted on said rear frame (222, 322) and adapted to drive at least one of said drive wheels, - a shroud (204, 304) covering at least partially said front frame (221, 321) and fixedly connected thereto, - at least one battery box (205, 305) detachably mounted on said shroud (204, 304) and in electrical communication with said electric motor, - locking/unlocking means (230, 330) adapted to prevent, or respectively permit, the disconnection of said rear frame (222, 322) from said front frame (221, 321), characterized in that said locking/unlocking means comprises a locking lever (230, 330) pivotally connected to said front frame (221, 321) between a locking position, in which at least one groove or one recess (332a1, 332b1) provided in said lever (230, 330) defines an abutment against which abuts said rear frame (222, 322) when the vehicle is in its normal position of use, thus preventing said rear frame (222, 322) to pivot relative to said front frame (221, 321), and an unlocking position, in which said rear frame (222, 322) can pivot relative to said front frame (221, 321), thus permitting the disconnection of said rear frame (222, 322) from said front frame (221, 321), and in that said locking lever (230, 330) is configured so as to move from its locking position to its unlocking position when said battery box (205, 305) is detached from said shroud (204, 304). - a frame (202, 302) having a front frame (221, 321) and a rear frame (222, 322) that are detachably and pivotally connected together, said front frame (221, 321) comprising means for receiving at least one steerable wheel and a steering mechanism and means (207a, 307a) for receiving a seat, and said rear frame (222, 322) comprising means (226a, 226b) for receiving at least two drive wheels, - at least one steerable wheel, a steering mechanism and a seat connected to said front frame (221,321), - at least two drive wheels pivotally connected to said rear frame (222, 322) via a single axle, - an electric motor mounted on said rear frame (222, 322) and adapted to drive at least one of said drive wheels, - a shroud (204, 304) covering at least partially said front frame (221, 321) and fixedly connected thereto, - at least one battery box (205, 305) detachably mounted on said shroud (204, 304) and in electrical communication with said electric motor, - locking/unlocking means (230, 330) adapted to prevent, or respectively permit, the disconnection of said rear frame (222, 322) from said front frame (221, 321),