There is not much I can say about just a battery except I hope it lasts longer then the original. I bought the original blower with the battery and charger from Lowes in summer of 2018. By spring 2019 the battery would not take a charge. That does not say much for a hundred dollar Echo Battery. I bought this replacement battery from Amazon in summer of 2019 and so far it is ok. For the complete unit it is great as a blower. It gets the job done.Wish it lasted longer. only about an hour blowing time. It worked!It works fine, just discouraged by the high price!The picture and the SKU both indicate 4Ah batteries. The product received was only the 2Ah model.This battery is too expensive and doesn’t last long.Doesn’t hold a charge as long as advertised. Also the battery is hard to remove from the charger and three blower both.Amazing ProductWorks as advertised