Bests & Worsts Reviews from Amazon

I have no idea how many B&D dustbusters we've thrown away in thirty years. My family never learns.Our latest (purchased November 2016) has a failing battery after less than a year and a half of light use. The charger is putting out the prescribed charge. The battery shows 15.3v. Turn it on and the whine gets rapidly lower pitched as it drops to 9 volts in 40 seconds and stops. Why are the reviews good? Is everyone just used to throwaway tools? It's not even like you could pop a new battery in. Junk. As a contractor who puts the date of purchase on every battery, I am here to tell you three to five years of constant use is what I'm getting from the quality batteries I buy. I won't mention brands because I think everyone knows what they are. Our next dustbuster is going to work with the18v lithium batteries I use in drills, impact drivers and circular saws.