If the batt is fairly new, and charged up as much as it will take, you might get a half hour...maybe more. A batt's life, (with no alt charging it), is measured in 'minutes', eg a '90' batt may last 90 mins, theoretically.
I don't disagree with TiAgX5, I am just being more optimistic,
But, I wouldn't bet it goes more than 5-10 miles at a decent speed; less at lower speed/distance covered.
GL, mD