Powerextra 22.2V 3000mAh Replacement Battery Compatible with Dyson DC31 DC34 DC35 DC44 (Not Fit Type B, DC44 MK2) 917083-01 Handheld Vacuum Li-ion battery, 3.0Ah Real Capacity, 22.2V,made with high quality LG cells The replacement battery is for Dyson DC31, NOT fit DC31 type B please check the connector of your original battery Made of lead-free SMT process,fit with the requirements of environmental protection. No memory effect. Can be charged or discharged as needed without loss of capacity. If you don't plan on using the Power Tool Battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. Ni-Cd, Ni-MH and Li-ion batteries will self-discharge during storage; remember to recharge the batteries before use. Guarantee: 30 days money back and 12 months limited Warranty from date of purchase, 24 hours warm-hearted service!