80 volt mower stuggles then stops on turbo mode
I have an 80 volt mower I purchased from Costco last year. The thing was a workhorse until about a month ago. It seemingly lost some power and now will stop after a few moments on turbo. I can run on normal all day long. I cleaned the bottom, and the batteries are secure when running. Any ideas on what can be done to get it's power back?