Flylinktech Dyson 22.2v 2000mAh Extended Battery Replacement For Dyson DC31 DC34 DC35 DC44(except DC44 Animal) 917083-01 Handheld Vacuum Cleaner Li-ion battery, 2.0Ah Real Capacity, 22.2V,made with high quality 18650 cells Fully compatible with your power tools, WILL NOT VOID your manufacturer warranty 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 12 months warranty guarantee and 30 days money back gurantee!