Synergy Digital Vacuum Cleaner Battery, Works with Vileda 137173 Cleaning Robot Vacuum Cleaner, (Ni-MH, 14.4V, 4000 mAh) Ultra High Capacity, Compatible with Auto Cleaner 11702 Battery - Walmart.com
100% Original LOSONCOER 4000mAh For Haier HB-QT51S Robot Vacuum Cleaner Recharge | eBay
7.2v 4000mAh Rechargeable Ni-MH Battery Pack Replacement for Neato Vac – XML Battery