Review on Upgrade Your Dyson V7 Performance With Biswaye 21.6V V7 Battery Replacement - Compatible With Multiple Models by George Cochran

So far this battery is working as well and possibly better than the original. Install is a snap by just removing 3 screws then removing the old and replacing with the new. The battery was almost fully charged when I received so I used it immediately. I ran it for approx. 20 minutes with no issues. The adapter plug was a little tight at first so removing the Dyson from the charger was difficult but after a few charges the vacuum slides out of the charger with no problem. This battery is used in a Dyson V7. The battery has a long run time on a charge, and we happy with this product.