Selling this so hopefully someone can fix it.    I bought this in 2018 and it stopped working in 2025.   It doesn't charge and it flashes red if you press the button.   

Was stored in the house when not in use.

The product is a defective EGO Power+ BA2800T 56-Volt 5.0 Ah lithium-ion battery for parts. It features a 5-year manufacturer warranty and weighs 5 lbs. This multicolored battery is specifically designed for use with EGO power tools, providing reliable power for a variety of tool applications.