CREJOY 22.2v Dyson Vacuum Cleaner Battery for DC31 DC34 DC35,DC44(Type i) Animal Exclusive 917083-01, 17083-2811, 18172-01-04, 17083-4211 Li-ion battery, 2000mAh Real Capacity, 22.2V,made with high quality cells Compatible Models: 917083-01, 17083-2811, 18172-01-04, 17083-4211 No memory effect. Can be charged or discharged as needed without loss of capacity. Made of lead-free SMT process,fit with the requirements of environmental protection 30 Days Money Back 12 Months Guarantee!