Harbor Freight advertises how they have quality products and tools. I find the quality of there products are low end and they are only interested in extended warranties. I purchased a Viking compact power pack for jump starting my car. The unit is a joke! The unit never held a charge. The lithium battery is garbage. I kept charging it and when. I needed, it was dead as a door nail. I purchased a second unit and the same mode happened and when I just brought it to the store, they said warranty is 90 days and since I did not take out extended warranty I could buy the new model. What good is a unit that cannot last with a lithium battery. I have bought a number of brands of high end tools, my experience is Harbor Freight tools are low end junk