Greenworks 40V Battery Charger - Genuine OEM Replacement for Greenworks 40V Tools | Fast Charging for Lawn Mowers, String Trimmers & Leaf Blowers | Perfect for Home Lawn Care & Landscaping

I use this battery as a backup in a Greenworks blower. I really like it since it is lighter than the OEM battery at a great price. After 2 months, the battery started dying after 5 minutes of use. Additionally, during charge my charger was blinking red, which indicates a bad cell. It was beyond the 30 day return window for Amazon. I was prepared to write a bad review. However, I reached out to the company and got a fast response. They asked a few questions about my use and then shipped me a new battery.Here are some things that I have learned. A blower has variable draw on the battery -- stop/start/stop/start as I am blowing areas and then walking to other areas. This shortens the life of the charge. I am sure there is a lithium battery expert that can explain why. I get longer life from the battery if I set the trigger to always on -- even while walking to another area. I found this to be true of the OEM battery as well. Bottom line: the new battery is working well and makes a great backup.