Battery Type --Upgraded 6000 Mah Real Capacity, 22.2 Volt, Li-Ion Battery Replacement Battery For Dyson Dc31 Type A, Not Fit Dc31 Type B. If You Need Dc31 Type B, Please Search : B087676Sjy. | | Perfectly Compatible -- 100% Compatible With Original Type A Dc31 Dc34 Dc35 Dc44 Animal 917083-01, (Not Fit All Type B Dc31 Dc44 Mk2 Model, Not Fit Dc35 New Version.) Please Check The Connector Of Your Original Battery When Purchased. It'S Type A, Not Type B | | High Capacity -- Upgrade 6.0Ah Capacity Can Provide More Power And Longer Runtime On A Single Full Charge. No Memory Effect. Can Be Charged Or Discharged As Needed Without Loss Of Capacity. | | Multiple Protection Safety System -- Be Multi-Certified, Tested And Valid By Manufacturer To Match Specifications Of Oem Products. Built-In High Quality Cells Which Can Protect Against Overcharge, Over Discharge, Over Current, Over-Voltage And Short Circuit. | | Warm Note -- Just After Using The Battery, The Battery Will.