Type A) 22.2V 3000mAh Li-ion Vacuum Battery for Dyson DC35, DC45 DC31, DC34, DC44, DC31 Animal, DC35 Animal,917083-01 - AliExpress
Amazon.com: Upgrade to 22.2V 6.4Ah Type A Replacement for Dyson Battery Compatible with DC31 DC34 DC44 (Not Fit Type B, DC44 MK2) 917083-01 Handheld Vacuum. : Home & Kitchen
Dyson battery pack tear down : r/18650masterrace
How to Repair Dyson Battery Pack - Salvage 18650 Cells - YouTube