About Masione: Masione has always devoted itself to providing products with excellent quality for the end-users. This is brand new replacement battery. It works just like your original battery and it can be charged by the original charger. All brand new replacement batteries we supplied are manufactured to meet the specifications of originals. Product Details: Battery Type: Ni-MH Battery Voltage: 7.2V Capacity: 2200mAh Color: Blue Compatible Brand: iRobot Certificate: CE Replace OEM P/N: CS-DM6780VX, CSDM6780VX, GPHC152M07 Compatible Models: iRobot Braava 320 321 iRobot Mint 4200 Mint 4205 Dirt Devil EVO M678 Package Includes: 1 x Masione 7.2V 2200mAh Replacement Battery for iRobot Braava 320 321 Mint 4200 Mint 4205 How to Install/Remove? To Install the Battery Pack: 1. Turn Power switch to the Off position. 2. Be sure dust bin is empty, then place your machine upside down (with cleaning brushes showing) on a flat surface. 3. Guide the Battery Pack into the battery compartment using your index fingers (as shown). The Battery Pack will click into place when properly seated in your machine. To Remove the Battery Pack: 1. Repeat Steps 1 & 2 from above. 2. Place your index fingers under the guide tabs on the Battery Pack, then pull upward to release the Battery Pack.