This high-efficiency 1500 mAh, Ni-MH 7.2V AA replacement battery part #4200B. This battery fits Mint Automatic Floor Cleaner 4000 series model Mint 4200, Mint 4205, Braava 320 and Braava 321, but it not compatible with Mint Plus 5000 series. This is a generic product designed and engineered in the United States by Crucial Vacuum. This is not a Roomba OEM product and is not covered under any