Generally, gas-powered weed eaters are more powerful than electric varieties, making them great for long or thick weeds. If you choose an electric tool, look for an option with a high voltage rating for maximum power against those tough weeds. The type of feeder string you use also makes a huge difference in how well the trimmer performs. Your user manual helps guide you, but square, multi-sided, serrated, or round strings slice through thick weeds easier. You may need to use a hedge trimmer or brush cutter for bushes and other overgrown areas with thick or tough stems. Investing in a weed eater that has attachments or is compatible with a larger line of yard tools can help you complete a variety of jobs.