Cobra Electronics JumPack XL - Jump Starter/Power Pack (CPP 12000)

I have the first version of this Cobra device which works great. I was able to start my 225 HP Yamaha outboard on the first turn of the key. And that was with a dead battery. Now comes a much more powerful version, the JumPack XL. Cobra asks: What if you could jump start your car, light-duty truck, cargo Van and charge your mobile devices off the same battery pack that easily fits in your backpack or glove compartment? The Cobra JumPack XL has a starting current of 300 and 500 peak amps. The Cobra JumPack XL has enough power to jump start most gasoline and diesel cars, light-duty trucks and cargo vans multiple times on a single charge. 3 amp USB port for charging portable devices, tablets and other 5V mobile devices. Built-in LED flashlight, SOS/strobe light. UL registered. 6.5" X 3.1" X 1.3". 1.1 pounds. $129.00. 

There are much newer models than this. Search 'jump starter - power pack".