John, the second of the two links is the one to the Cobra. I worked for me just now.
Jim D: run time is usually about an hour and a half to three hours before they begin to slow due to low voltage (they run at lower speed for about another half hour). nd it depends on speed they are set at and the battery size that could be fit in the car. The Cobra, with a tiny battery if set to maximum speed (about a scale 65 mph) will run only about an hour. Set to half speed it will run about 90 minutes. Model station wagons that have the interior filled with batteries and windows painted black, on the other hand, will run all day (maybe six hours, about as long as I am ever in the train room running trains) at about a scale 20 mph.
