BRAAVA 320 Battery for iRobot Ni-MH 7.2V 2500mAh BRAAVA 320 321 Mint 4200 4205 | eBay
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
1500 mAh NiMH Battery For Braava® 320 And Mint 4200 | iRobot