I have a quatum 610 power chair when i use it the

i have a quatum 610 power chair when i use it the batterys (new) discharge fast i get about 2 miles per charge it makes a clicking noise but not all the time and even makes the clicking noise after its shut down there is a black box on the front and the red like always blinks even after it has been turned off the blinking stated the batterys need charged but the batterys are fully charged there are no codes blinking from the joy stick any help would be great thanks ..........