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Dyson DC31 Animal DC 31 Stick Vacuum Cordless OEM with charging dock and power | eBay
Dyson DC31 Handheld Vacuum Cleaner: But, Is It Strong Enough to Handle Killer Dust Bunnies? - This Full House Reviews
Amazon.com: ARyee 22.2V 4.0Ah DC35 Battery Replacement for Dyson DC31 DC31DC34 DC44 Animal 917083-01 17083-2811 18172-01-04 17083-4211 Handheld Vacuum (Only Fit for Type A, Not fit All Type B Model, DC44 MK2) :
Full Dyson Vacuum Model Numbers & Product List. With Photos. Better than Wikipedia.
6.0Ah DC34 Type B Battery for Dyson DC31 DC35 DC44 Animal Vacuum Cleaner Only Fit for Type B - Walmart.com
22.2v 3000mah Lithium Replacement Battery For Dyson Dc44 Type B Dc31 Dc34 Dc35 Mk2 Cordless Vacuum Battery Only Fit Type B - Rechargeable Batteries - AliExpress