Synergy Digital Vacuum Cleaner Battery, Compatible with Electrolux ErgoRapido ZB3104 Vacuum Cleaner, (Li-ion, 14.4V, 2500mAh) Ultra High Capacity, Replacement for AEG 140026702013 Battery - Walmart.com
Battery suitable for Electrolux ErgoRapido ZB3004 - 1500 mAh 14.4 V battery (Black) - BatteryUpgrade
AEG AG901 Ergorapido replacing the batteries - iFixit Repair Guide