I have had my Dyson for about 3 years now, it's been amazing. However recently it stopped working and I could see the red light on the battery. Indicating that it was probably dead and not charging. I went ahead and purchased this item. After receiving it, I followed a youtube video on how to replace the battery. It was super easy, I had to remove 2 Philip type screws and slot the battery in. After fixing the screws back and charging it; it works like brand new.