Actually nothing should go wrong with a requirement of 2A and a specification of 2.4 A, but unfortunately does not accept my Toshiba AT300SE-101 to 2.4A port. It constantly changes between loading and battery operation (even if the engine of the car is running). When using the 1A jack everything works fine, but the performance is not enough in the long run, at least get no error message. Perhaps the bushes are so labeled upside ??? Either way I expect from Varta a properly functioning product. Too bad, so it's back.