Hi, I am 59 years old, my husband left me so I find myself having to do my own yard. I have become proficient in mowing the lawn but doing the edges is another story. i would like to buy a line trimmer, but am unsure of what one would be best suited for my needs I have a fairly big back yard, and need the trimmer to do my fences and footpath. I am thinking a battery operated one so i don't have the problem of the cord getting in the way.