Hedge trimmers can be electric or gas-powered. Both have their virtues. Electric models are quieter, take less maintenance, are more environmentally friendly (no noxious exhaust fumes), and are generally more lightweight. Cordless models allow you to trim anywhere without being restricted by the length of your extension cord. No cords to worry about clipping, either. For bigger jobs, however, nothing beats the power of gas models, many of which offer rotating heads and other options to make trimming easier. If you have a large yard and lots of trimming chores to do, a gas-powered model is the way to go, plus you never have to worry about batteries running out of power.