If regenative braking adds X charge to batteries, then afterwards speeding back to original speed will take more than X energy.
Regenerative energy is much more efficient than normal braking; but in any case it's far more efficient to simply stay at the same speed. Stop & go is extremely inefficient with normal brakes, and just inefficient with regenerative brakes.
Re:A Most Peculiar Test Drive
by stcredzero on Thursday February 14, 2013 @02:33PM
(#5221555)
Only if there's a whole lot of downhill!
However I don't understand your part about regenerative braking. From everything I've read, regenerative braking very much is capable of adding charge to the batteries.