I have a 07 CC Precedent my friend= has a 08 we have the same speed control lift wheels we both have been radared im going 19 and his is going 17 but he always stay way in front of me and I never catch him until we go up hill then I slowly catch and pass him to where he cant catch me. Now my other friend has a stock DS and just put all new batteries that had not been fully charge and same thing hes way out in front and i cant catch him now. I havwe 08 Trojans and they all read almost 13. I am using tap water and I checked and I do nee to add the water is at the top of the plates but I am sure this has nothing to dio with it. I free roll my cart but i may also back off the brake a little more just to make sure.