Abstract: An electric quantity indicator for an electromotive vehicle comprises an electric measuring wire parallel connected to a battery; a feedback circuit connected between a motor of the power supply load and the electric measuring wire; and a meter responsed to the quantity of electricity of the electric measuring wire. The meter is an electronic display panel, and the feedback circuit and the electric measuring wire are installed with analog to digital (A/D) converter for address dividing the value in a memory, in which this value is displayed in the aforesaid meter. Thereby, as a load is actuated and power is consumed, the feedback circuit will detect, and the electric measuring wire will conduct, a real value about the power stored in the battery is displayed on the meter so as to be viewed by a user. Therefore, the condition that due to an error of electric quantity, the user can not know the real the electric quantity and thus the car is stopped owing to exhaustion of electric power is avoided.

Abstract: Lever bar activation detecting structure including a lever bar and a lever bar pivot seat with which the lever bar is pivotally connected. A magnet and a magnetic switch are respectively disposed on the lever bar and the pivot seat opposite to each other. When the lever bar is pressed, the magnet is moved relative to the magnetic switch so that the magnetic switch is energized to generate a signal which is detected and identified by a controlling unit for turning on an indicating light. The magnet and magnetic switch have excellent waterproof effect and the structure an be easily assembled to lower cost. The detecting structure is used for detecting the braking operation of an electric two-wheel vehicle, especially for an electric bicycle.