I purchased this as an upgrade to the prior model which I love. I wanted the lighted one and increased power. I have 2 batteries with my old vacuum and usually can vacuum the entire house with just one. Not with this vacuum. I used 2 batteries to vacuum 1 room. A battery is lasting about 10 minutes with this one and the same battery lasting for days and multiple uses vacuuming the same room. Whatever upgrades you did have failed