Thank you for sharing your feedback with us. We are thrilled to hear that your Greenworks 60V 25" Self-Propelled Lawn Mower is starting up easily and delivering great cutting performance. We appreciate your honest note regarding the weight and resistance when pushing the unit without power; because self-propelled mowers feature integrated wheel-drive transmission gears, pushing them manually when the battery is depleted creates natural mechanical drag.
To help maximize your runtime and make yard work as seamless as possible, here are a few quick tips to keep in mind:
* Dual-Port Auto-Switching: Ensure both 4.0Ah batteries are fully charged and properly latched into both battery ports before mowing, as the system automatically switches from one battery to the other to extend your uninterrupted mowing time.
* Managing Drag & Self-Propel Drive: When you reach the end of a pass or need to pull the mower backward, release the self-propel drive lever a second or two before stopping your forward motion, this allows the drive transmission gears to fully disengage, making turns and manual pulling much smoother.
* Deck Height & Grass Conditions: Avoid cutting more than one-third of the grass height at a time and mow when the lawn is dry. Cutting tall or damp grass places extra load on the motor, which drains batteries significantly faster.
For helpful video walkthroughs, battery care guides, and mowing tips, feel free to visit the official Greenworks YouTube channel. If you have questions about runtime, picking up a secondary battery set, or need any product support down the road, please d not hesitate to reach out directly to our Greenworks Customer Success Team at 1-888-909-6757 or through our online support center, we are always happy to help!

Hello IA123.
Thank you for sharing your feedback. We understand how important it is to achieve the expected runtime for your yard. Actual performance can vary depending on grass conditions, cutting height, and mowing pace, thicker or taller grass can place a higher load on the mower and reduce runtime. To help improve performance, make sure the battery is fully charged before use, try mowing when the grass is dry, and start with a higher deck setting for the first pass in dense areas. It may also help to mow at a steady pace and avoid forcing the mower through especially thick patches. If the runtime continues to fall significantly short of expectations, we recommend reaching out to customer success so the team can review your specific setup and assist further. They can be reached either using the online chat function, on Greenworks Tools page, or by calling 1-888-909-6757.