wrote in message
...
I am making a B.Tech final year project on Lifting Jacks.On certain
calculations i found that i would need a 6 horsepower.I would like to
know battery specifications for the DC Motor to do so....

You ask about voltage but this is something you must choose yourself after
considering what batteries are readily available on the market.
Then you will be able to calculate the amperes to give you your 6hp.
Then you will need to decide for how long, and how often you will take 6hp
without recharging the battery.
From that you can decide what battery capacity in amp/hours you will need.
Good luck with your project!