for used Electrolux sweeping robot battery Electrolux Purei9 OSBP72L125 7.2V18Wh | eBay
Synergy Digital Vacuum Cleaner Battery, Works with Electrolux ZB2906 Vacuum Cleaner, (Ni-MH, 12V, 1300mAh) Ultra High Capacity, Compatible with AEG 4055132304 Battery - Walmart.com - Walmart.com