Ego battery was left outside in rain. Have followed recommendations and allowed it to air dry for over a week. Attempted to charge this yesterday, but the charger kept reading it as fully charged even though it did not last in mower.
Ego batteries are designed to handle the odd splash or two. If rain got to your battery then something went wrong. You have a 3 year warranty, give Ego Customer Service a call and they’ll get you fixed up.