Have driven 1200 Km without any significant problems. Recently, once the battery was empty and while driving on the charger I experienced a loss of power feeling like there is not sufficient electricity generated, but it went a way when restarting the car. Then, again, but this time when i had some energy left in the battery the problem reoccured. Had to drive on cruise control to be able to drive somewhat smoothly. The motors did simply not respond accurately when trying to accelerate. As in many other cases, the problem went aways once the car was recharged and restarted - thats btw a wonderful feature - anyone having the same issue?