I am a doctor by profession  but reading about fuel prices and pollution got me in this

i use a electric scooter for last two years and its fine for my daily work as well as for my part to keep earth clean

i want to ask if i put a calcium calcium battery to run a 1000kg gross weight car with a800 cc petrol engine

firstly what battery power i need

secondly at asteady speed of 80kmph will the dynamo can recharge the batteries sothat the speed can be maintained 

thirdly what i felt with the scooter was the acceleration and decelaration used lot of battery power so for that can the petrol engine be used for these two and then on steady speeds the car shifts to the traction motor Battery driven technology

if some one knows please answer