Authentic Braava 380t and Mint Plus 5200 Automatic Floor Cleaner Battery Up to 4 hours run time dry sweeping or up to 2.5 hours run time wet mopping Charges in approximately 4 hours with Mint Plus Automatic Floor Cleaner Nickel Metal Hydride, 2000mAh Compatible with Mint 5200 and Braava 380t Not compatible with Mint 4000 series or Braava 320