This battery is fine at less than one-third the price of one from Dyson. Unless you have a tiny phillips head screwdriver, you might want to order the screwdriver to go with it.
Pros
Battery Voltage: 21.6V | Capacity: 6.0Ah | Battery Type: Lithium-ion | Replacement for Dyson V7 battery, compatible with Dyson V7 series vacuum cleaner and V7 battery charger.
Cons
Junk battery’s don’t buy theses buy the factory ones it will save yourself a lot of time and hassle