
I use this in a car auction environment where we are constantly dealing with dead batteries. I have a golf cart with powerful booster batteries and 20ft cords to start cars but they are very heavy and awkward to pull every time I start the car so I bought this unit to help me life one little to facilitate. I have had several lithium ion launchers (including NOCO) in the past but they are very easy to damage. It's a beast, but it has its limits. I'll start with this: 1> Sometimes when plugged into a FULLY DRAINED battery it doesn't recognize that it's plugged in and therefore doesn't go into JUMP START mode, effectively rendering it unusable. This happens about 10% of the time with fully discharged batteries. As they say, I was aware of these limitations beforehand, but this device has several interesting features: 1> It's easier to use than heavy-duty interconnect cables that are rolled into the back of my golf car. 2> I can connect it to my power start batteries in my truck to pre-charge it so it's ready to go almost any time too long 4 > Some diesel trucks are difficult to start with batteries in my truck. I charge it up (using the same batteries) and then plug it in at the same time as my heavy duty cables and it adds enough power to get those suckers going! It works like a charm almost every time. I have no regrets about my purchase and I give it 4 stars but if there was a way to put it into fast boot mode even if it doesn't recognize it's connected to the battery then I would give it 5 stars.

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