I have a 4 cycle craftsman trimmer that works perfect for my needs. It's about 5 years old, and I trim 4 lawns worth of houses with it, and my only complaint is the line feeder messes up every now and then. I've tried a battery powered trimmer before and they don't seem to have enough power to go thru heavy weeds and grass for my liking. Plus the cost of batteries is ridiculous. I thinking about going with a wire cutting head, and ditching the line. I Guess if you only have small areas to weed wack, and battery one might be all you need. If you do alot of trimming gas powered is the only way to go. Look at any lawn mowing company and what their go to machines are. They cant stop working to charge batteries every 3 yards.,,,