I have a weak battery and have decided that getting one of the above is a really good idea ( until mine cr*ps out completely ). So in my extensive search I found one " Stanley " brand for $45.00 delivered. It has about the same specs as all the others out there ( except less money ). I like the fact that it has a cig lighter plug to use for jumping ( the less expensive ones use alligator clamps ). The model # is P2G7S , no air compressor but has usb ports and wires for that ...... Does anyone else here have this one ???? .... I don't want to spend any more money for something that I may never use ......... Thanks......However if you have one you like..... that is less expensive I'm interested ..... Mike