I know it’s a refurbished/renewed MacBook Air but one of the key factors why I bought this was the battery life of at least 8 hours. I had this charged through out the day and unplugged it over night. As soon as I had turned it in the battery was at 10 % level. Shocking because I didn’t have anything left on running. It was on sleep mode. I wanted to test it out and see.  During use it would only last about 3 hours and I’m just surfing the web. The MacBook Air is known for its long battery life. But not this one. Oh well. It did come in pretty good shape and it runs great. I’ll just have replace the battery at some point.