Greenworks tools has refurbished 80v battery pack on sale for $84.99 which more than 50% discounted wrt new battery of same rating. To make it sweeter, apply coupon ExclusiveDOTW.
Buy 2 packs to enjoy free shipping (offered on orders over $100).
Useful for 8v Greenworks tools but also great for harvesting Li batteries for other projects.
https://www.greenworkst