After installing and charging for the first time all seemed well. That was until the Roomba docked to recharge. Every time it causes a charging error 8, which means the battery has stopped charging. You physically have to remove the roomba from the charger and put it back on to clear this error. Very inconvenient when you aren't home and want it to vacuum on a schedule. I would have returned it but the return window closed before I installed it and found this problem.