MBVC0004, CoreParts Battery for iRobot Braava 10.8Wh Ni-Mh 7.2V 1500mAh Braava 320, Mint 4200, 4205 | EET
Amazon.com: HQRP 2200mAh Battery Works with iRobot Mint 4200, Mint 4205, Braava 320, Braava 321, 4408927 Automatic GPHC152M07 Ultra High Capacity [Robotic Vacuum Cleaner] : Home & Kitchen
Amazon.com: XML Battery (1 Pack) 7.2V 2200mAh Ni-MH Battery for iRobot Braava 320 321 Mint 4200 4205 4000 Series : Home & Kitchen
7.2V 1200mAh NiMH Battery for iRobot Mint 4200 Braava 320 – Melasta