Hello Suzannah.

Thank you for taking the time to share your feedback. Runtimes and area coverage can vary depending on several factors. Grass height, grass type, mulching, and operators’ technique etc. Uneven ground, trees, bushes, and other obstacles on your lawn can significantly decrease the amount of area you can mow effectively with each pass. Your mowing pattern and technique can also impact on how much area you can cover each time. If your lawn has significant challenges, you might need a mower with features better suited for your specific conditions.
Greenworks 60V batteries are backed by a four-year warranty, from the date of purchase. The rate of the battery degradation depends on how well the battery is maintained. There are different variables to consider when giving an adequate answer. In optimal conditions batteries should keep most of their charge to about 2000 full cycles: 1000 with a rapid charger. The charger fan is essential to maintain the battery's health by preventing excessive heat buildup during rapid charging. A noticeable fan noise is considered normal for most high-power battery chargers. They will shut down once it senses the internal battery thermometer is room temperature (so possibly not as soon as charging is complete – depends on battery temperature). If the fan suddenly becomes significantly louder than usual, please start a Live chat on www.greenworkstools.com or call Greenworks Pro toll-free helpline 1-855-345-3934. So, our experts can discuss your experience; please have your unit, battery and charger with you along with the model and serial number to complete troubleshooting to ensure a quick resolution is provided.