Hi Tim the tool man. Thank you for your feedback. We are sorry to hear this was your experience. If you are able to cross-test the batteries with another charger and another unit, this can help determine if the battery may be the issue. Should you have any further questions or warranty needs, please contact us directly through chatbot on Greenworks Tools website that will direct you to a live agent or call us at 1-888-909-6757 (1-888-90WORKS). Check out some helpful tips to extend your run time!

1) When cutting thick grass, reduce walking speed to allow for a more effective cut and a proper discharge of the clippings.

2) Only mow 1/3 of the total grass length at a time - no more. For a healthy lawn, always cut off one-third or less of the total length of the grass. The average lawn should be approximately 1 1/2 to 2” (3.8 to 5 cm) long during cool months, and between 2" to 3 1/4" (5 cm to 8.3 cm) long during hot months.

3) Mow when the grass is dry. As this is an electric unit, mowing wet/damp grass is a safety issue. However, ensuring the grass is dry will also help the grass cut cleanly and discharge appropriately. Wet/damp grass carries more weight and will mostly stick to the blade/motor shaft and will not appropriately discharge or cut easily.

4) Make sure the battery is cool before use. When the battery will not be in use, we suggest storing it indoors, in a cool dry area - away from direct sunlight. Leave the charger unplugged and the battery disconnected from the charger unless it needs charging.