22.2V 3.5Ah DC31 Battery and Charger Replacement for 917530-01 917530-02 917530-11 17530-02 Compatible with Dyson DC30 DC34 DC35 DC44 DC45 DC56 DC57 Battery (Not Fit Type B) - Walmart.com
Replace for Dyson DC30/DC31/DC35 22.2V Vacuum Type A Battery - DYC350VX (2 Pack) - Walmart.com
Amazon.com: Synergy Digital Vacuum Cleaner Battery, Works with Dyson DC30 Vacuum Cleaner, (Li-ion, 14.8, 1500mAh) Ultra High Capacity, Compatible with Dyson 17083-01-03, 917083-02 Battery : Home & Kitchen