Hello, Tom - We're sorry to hear that you haven't gotten the runtime you were expecting! A great way to improve the run time of the edger, as well as all your ONE+ products, is by adding larger capacity batteries to your collection. The larger capacity batteries will provide more run time, and since they're compatible with all our ONE+ products, you can swap them in and out to get even more run time. We recommend you check out our 2-pack battery offers on the Home Depot website. We hope this helps! And if you'd like to discuss your experience further, then please feel free to email us anytime at Reviews@RYOBItools.com.