Updated: They sent a replacement unit. The new unit worked to jump my ATV, haven't tested on a car yet. Recommend testing immediately when you purchase to ensure you get a defective unit.
Ordered too long ago to return. So far batting 0 for 3, 1) wouldn't start my 2.3l Saab 2) wouldn't start my ATV, did have enough juice for it to crank over twice. 3) For grins tried to start my 5.4l F150, not even a click. So far, its just a supper large and heavy phone/tablet charger.