.4v Battery for Roomba Discovery 400 410 418 4000 APS 4905 - 2PK ML-RMB400 can be charged or discharged as needed without loss of capacity. The ML-RMB400 battery is fully compatible with all Roomba FloorVac models: iRobot Roomba 400 Series, Discovery Series, Create Models and Dirt Dog Models.14.
The ML-RMB400 battery is fully compatible with all Roomba FloorVac models: iRobot Roomba 400 Series, Discovery Series, Create Models and Dirt Dog Models.