This depends on the type of work you want to do with your chainsaw. Many modern battery models have as much power as some gas-engine models and can handle most light-duty or moderate chainsaw work. Battery-powered chainsaws are also much quieter, require far less maintenance, and don’t have the toxic emissions of gas models. If you need a tool for felling large trees or other heavy-duty work, a battery-powered motor might not be enough. A gas chainsaw will give you more power and be better suited for extended periods of difficult cutting.