You can view your machine model, or your battery's original factory code corresponding to the above. If they are the same, you can use compatibility. If it's not found or doesn't match, You can contact customer service to help you find the right compatible battery. Fit Model Compatible For Dyson V10 Slim V10 Digital Slim V10 Digital Slim Fluffy Extra V15 Detect Digital Slim Fluffy Pro Digital Slim Fluffy Extra V12 Detect Slim V11 Slim V12 Slim Part No：Compatible For Dyson 398006-01 398857-01 965171-02 971450-06 SV18 specification Product Type: Li-ion Volts: 18.0 Net Weight: 383.0 Grass Weight: 573.0 Capacity: 2500mah-5000mAh / 45.00Wh Color: Black Dimension: 133.40 x 76.25 x 77.40mm