Hello Notsure.
Thank you for sharing your experience. We understand how frustrating it is when a battery does not deliver the runtime you expect, especially right out of the box. Based on what you described, the red temperature indicator you encountered is typically tied to the battery’s built-in protection system. Lithium-ion batteries are designed to temporarily shut down if they become too warm (or too cold) during use in order to prevent damage, and this can result in shorter initial runtime or the need to let the battery rest before charging again.
There are a few things that may help improve performance moving forward. Ensuring the battery is fully charged and properly seated before use is important, and allowing it to cool to room temperature between heavy use and charging cycles can make a difference. If the battery continues to overheat quickly or only provides very limited runtime after a few cycles, our succrss team can assist with further troubleshooting. They can be reached either using the online chat function, on Greenworks Tools page, accessible by clicking “Chat Now” in the bottom corner of your screen or by calling 1-888-909-6757.

Hello Chris O27.
Thank you for your feedback, we are sorry to hear the runtime has not met your expectations.
For this kit (1349002), the “up to 60 minutes” runtime is based on ideal, low-load conditions. Actual runtime can vary significantly depending on factors such as grass height/density, cutting height setting, terrain, and self-propel usage (if applicable). In typical residential mowing conditions, it is common to see shorter active mowing time, especially in thicker or taller grass.
To help maximize runtime, we recommend, mowing more frequently to avoid cutting overgrown grass. Raising the cutting height to reduce motor load. Ensuring the deck and blade are clean and free of buildup. Using a slower walking pace to reduce strain on the motor. Confirming batteries are fully charged and properly seated before use.
Greenworks 48V (24V x 2) 5.0Ah batteries generally takes 75 minutes to fully charge when using a Greenworks dual-port rapid charger. Charge times of approximately 2–2.5 hours are expected depending on battery temperature and charge level.
We understand your concern regarding return options and appreciate you sharing your experience. If you need help optimizing performance further, our support team is available to assist. They can be reached either using the online chat function, on Greenworks Tools page, accessible by clicking “Chat Now” in the bottom corner of your screen, or by calling 1-888-909-6757.