Hello Carol27.
We are sorry to hear you are not fully happy with the runtime you are getting with the battery included. As we are not sure of the condition of your lawn, we are not exactly sure why the battery did not meet your expectations. The maximum runtime often applies to a relatively flat, open yard. Slopes and obstacles require more power, and users can expect running time to be less, if this is the case. Runtime measurements are also related to the condition of the grass and if it is well-maintained. Tall, thick grass requires more power, and you must mow it slower, consuming added runtime. Using self-propelled, throughout the mow. Self-propelled mowers do use more batteries than standard push mowers as more power is being demanded from the battery to run the blades and the wheels.
Here are a few tips to ensure the max runtime is achieved. Ensure you charge the battery fully before each use, maintain the battery properly by cleaning terminals, avoid extreme temperatures during storage. Mow in a straight line and only use the self-propelled feature when needed. If the grass has been left to exceed four inches, we advise that you raise the cutting height and cut no more than one-third of the length of grass at a time, wait a couple of days and do another one-third, cut when grass is dry and walk at steady pace to allow the blade to work more efficiently. As the lawn becomes consistently maintained you will see the cut and runtime improve. Hope these tips help! If you ever have specific questions or concerns about our products, contact Greenworks via Live chat on our website (www.greenworkstools.com), call Greenworks Pro toll-free helpline at 1-855-345-3934 or refer to the FAQ ask section of the tool or ask us a question, anytime