AEG AG901 Ergorapido replacing the batteries - iFixit Repair Guide
Amazon.com: Synergy Digital Vacuum Cleaner Battery, Compatible with Electrolux ErgoRapido Vacuum Cleaner, (Ni-MH, 14.4V, 1500mAh) Ultra High Capacity, Replacement for AEG 2199035029 Battery : Home & Kitchen
NEW REPLACEMENT HANDVAC for Electrolux ErgoRapido EL2089 # 69330 Battery Pack $40.00 - PicClick
Amazon.com: Synergy Digital Vacuum Cleaner Battery, Compatible with Electrolux Ergorapido Plus Vacuum Cleaner, (Li-ion, 18V, 2500mAh) Ultra High Capacity, Replacement for Electrolux VBHC7787E Battery : Home & Kitchen