AEG AG901 Ergorapido replacing the batteries - iFixit Repair Guide
Electrolux ZB3002 Battery Replacement
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
Amazon.com: FOUNCY Battery Replacement for ELECTROLUX Part NO: 4055478301, 4055542544, PQ91-50MB, PQ91-ALRGS, PQ91-ALRGY, PQ91-ANIMA, PQ91-ANIMS, PQ91-GREEN, PQ91-P50MB, PQ92-ALGS : Health & Household
Batteries N Accessories BNA-WB-H11241 Vacuum Cleaner Battery - Ni-MH, 4.8V, 3000mAh, Ultra High Capacity - Replacement for Electrolux 4/P-140SCR Battery - Walmart.com
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