New 18V 3400mAh Battery For Electrolux ZB11ER, ZB13ER, ERGO11, ERGO12, ERGO13, ZB112ER, ZB3014G, ZB3015SW, ZB3211, ZB3212 +Plug - AliExpress
Amazon.com: Synergy Digital Vacuum Cleaner Battery, Compatible with AEG ZB3211 Vacuum Cleaner, (Li-ion, 18V, 1500mAh) Ultra High Capacity, Replacement for Electrolux VBHC7787E Battery : Home & Kitchen