Good chainsaw but power / limited autonomy

With a more than respectable size guide (40cm) Greenworks Tools gives us an effective chain saw for occasional use, to cut a few trees into logs, etc. Unfortunately, but is it just the case of my copy?, Power and autonomy have not convinced me for intensive use as she normally 1800W displays the counter. The obligation to have a cable is specified but I still a little cool, you quickly feel limited, especially in the countryside ... An especially appropriate chainsaw for DIY / Sunday so gardeners.