Review on AUTOGEN Car Jump Starter 4500A 99.9WH With 12V Socket Portable Battery Charger Booster Pack, Jumper Pack With Intelligent Jumper Cables For (12.0 Liter Gas And Diesel) Heavy Duty Trucks Boats RVs by Matthew Burnett

This has been a life saver! I have jumped several batteries, even ones that were completely dead, with the boost feature. The largest vehicle was a 5.7 Hemi Dodge Ram, so I can't speak to anything larger. Also just a great back up battery bank for charging smartphones, lanterns, etc.