Amazon.com: Synergy Digital Vacuum Cleaner Battery, Compatible with Electrolux Pure PI91 Vacuum Cleaner, (Li-ion, 7.2V, 3400mAh) Ultra High Capacity, Replacement for AEG OSBP72LI Battery : Home & Kitchen
Cameron Sino 1500mAh/2500mAh Battery for Electrolux ZB3101, ZB3102, ZB3103, ERG101, ERG103, ZB102ER,ZB103ER,ZB3102BRCK,900273758 - AliExpress
Vacuum Cleaner Battery 1500mAh/2500mAh for Electrolux Ergorapido Plus,ZB3011,ZB3012,ZB3012,ZB3013,ZB3013,ZB3010,ZB3011,ZB3020S