Through this project, we have tried to implement a battery management system for a hybrid electric vehicle. The idea of this project came from an electric vehicle safety system. In the electrical vehicle there is a possibility of battery explosion due to excessive temperature, high current or may be improper working due to high discharge current for monitoring these parameters on Smartphone we have designed circuit for same and also for efficient fuel consumption we introduce accelerometer based circuit for slope detection for fuel source change. By using reverse back emf of vehicle tires we can charge a battery. We have used ATmega328p, Bluetooth, accelerometer sensor, lead-acid battery as the hardware part and programming is done in Embedded C using Arduino tool and for Android App, we used MIT app inventor 2. This paper highlights the use of Bluetooth instead of ZigBee in communication.