Bought to replace a 30 year old stand and as I already have many bd 20v batteries I thought That this is the one I need It works better than my old vacuum and weighs next to nothing. I can vacuum an entire house in 1/3 the time without having to lug around a cord and search for an outlet in every room. I like this vacuum compared to the old one. The battery life of a 1.5Ah battery is about 3 minutes, but I have three 2.5Ah batteries that last the whole house and a 6Ah battery that lasts several times. I find that the vacuum cleaner also works better with 2.5 or higher batteries. Purchase recommendation if you already have 2.5Ah or higher batteries, otherwise I would recommend buying a battery with a vacuum cleaner.