and do not think it is 100 amps for more than a few seconds. alternator works great. helped determine need for new battery

Great little machine. Only reason i gave it 4 stars is because older model came with a cord to charge it up. New one doesnt.

Stanley fatmax is great for jump starts, inflating tires, charging electronics, portable AC power supplyn etc etc.

Digital inflation works great! Set and walk away! Started my car with completely dead battery effortlessly.

Had my battery to go dead one day, tire needed air another day and I was able to check my neighbor alternator...awesome and a must have!!

Me encanta es muy funcional sería estupendo si tuviera conexión eléctrica ese lo haría excelente para mi

Great tool to have in your car/truck!! I bought one for my wife's car and one for my truck. Now, I would not be without one.

Worked for a few times but now the air compressor shorts out as soon as you try to use it. Not so good

This is the 3rd FatMax I have purchased from Sam’s. Great rescue device (jump and inflator) that fits neatly in a trunk.

I bought this unit because of the multiple features. We will take it with us on road trips and also with us when Side xSiding.