This one Jean is one of the most important bits of kit to carry. No tow starting with an automatic vehicle and if you run your battery/batteries flat then this will get you out of trouble. A great bit of kit that can also charge phones and cameras etc. I use at my work place for plant machinery, boats and on occasion in the village where I live to start neighbours cars. A great insurance policy in my view.The problem with this forum is that if I buy all the nice tools that a lot of people are promoting - and this one is also very tempting, and I already bought some nice stuff - that I will need a second Grenadier for carrying them all