FUZADEL 7.2v NiMh Battery Replacement for Mint 4200 4205 Automatic Hard Floor Cleaner iRobot Braava 320 321 Floor Mopping Robot Nimh Battery Cell 7.2v NiMh Battery for Mint 4200 4205 Automatic Hard Floor Cleaner 7.2V 2000mAh 10.8Wh Ni-MH Battery.compatible with Mint 4200 Robotic Vacuum Cleaner(The Battery color random,Blue,Green,Yellow.....) Replacement for iRobot Battery Model/Part Numbers: 4408927, GPRHC152M07. Compatible with the following iRobot Floor Cleaning/Mopping Robot Models: Braava 320, Braava 321, Mint 4200, Mint 4205. Battery will last up to 2-3 hours dry mopping and up to two hours damp mopping and fully charges in approx. 10-12 hours. Over charge and discharge, detection protection,Aging-Test for every battery before packing,High abrasion resistance shell.