... And the robot back energy ...

After just over two years, our Romba showed 555 fatigue. Vacuuming went, but he ended his work often with the urgent request to be loaded instead of driving themselves to the charging station.

With the new battery here runs like in the old days and still has the power as before.

For capacity:
Before I bought the battery, of course, I've read the other reviews; there was doubted whether actually stuck 3500 mAh in it as indicated.
Well, unfortunately I can not measure it that. The original battery was only 3000 mAh nameplate. Subjectively, it supplies our Roomba with enough power and is an adequate substitute.

Domo Arigato, Mr. Roboto