Hum
The advertising is let's say a bit optimistic. Probably be able to jump start a battery 1 time in the south , but probably not once in cold weather, The device weight 1 lbs, about the weight of 8 size C batteries. Waste of money. And look at the length of the jumper cable!! and worse of the size of wire !!!
And I found out this thing is a 12,000mAH or 12Ah and at 50% is 6Ah, This fit in your hand??
Good luck WoodGlue, but if I was you i would cancel that order right away