I immediately bought a spare battery, the charge holds for 30 minutes, but this is enough, because if you use it longer, your back and arms begin to get tired. I have a large enough volume for mowing, so the main area is mowed with an electric trimmer, and between the bushes and where the cable length is short, with a battery. Pros: The trimmer is lightweight, takes up little space, is easy to use due to autonomy, no need to unwind the wire or mix liquids, it is convenient to use in hard-to-reach places. Cons: I don’t know if this can be called a disadvantage, the main task of the trimmer is to remove grass in hard-to-reach areas, to decorate an already mowed lawn, that is, they don’t need to mow large areas with dense vegetation, it’s not for that.