7.2V 2000mAh Replacement Battery for iRobot Braava 320/321 & Mint 4200/4205, 2000mAh Higher capacity: 500mAh higher comparing to the original 1500mAh battery By Tenergy - Walmart.com
THE IROBOT BRAAVA 380 (Floor Mopping Robot) - Parts Only - £29.99 | PicClick UK
User manual iRobot Braava 320 (English - 15 pages)
iRobot Braava 320 Review | PCMag
7.2V 2600mAH iR320 Rechargeable Ni MH Battery For iRobot Braava 320, 321, Mint 4200, 4205 Mopping Robot|Replacement Batteries| - AliExpress
Replacement NorthStar® Navigation Cube For Braava 320