Review on Maximize Cleaning Efficiency with Powerextra High Capacity 7.2V 3000mAh Ni-MH iRobot Mint 5200 Vacuum Cleaner Replacement Battery for iRobot Braava 380, 380T, Mint 5200, 5200B, 5200C Floor Mopping Robots - Unleash the Full Potential of Your Cleaning Robot! by April Boyce

Get a few hours on a single charge. However, until the end of the year they suck, do not hold a fee. This has already happened with two different brands, Mr Batt and Powerextra. Just take the cheapest. Buy once. Replace after a year. The annoying thing is that iRobot Braava knows it's a fake universal battery and repeats the error tone while it charges for hours. Either open it up and turn off the speaker, live with the stupid sound, or buy a real $40/$50 battery. Powerextra High Capacity 7.2V 3000mAh Ni-MHEDIT: A few days after my review, I was contacted to express my dissatisfaction. Made me a refund. So the company behind their product is quite active and cares a bit. So if you have a problem, contact the company