quality posts: 1
A word of warning on the Roombas. I bought a 400 series (Sage) several years ago here on woot and I love the thing. However, the batteries on these things are known to only last a year or so and then it will cost you $50-$70 for a replacement. I loved the thing when the battery worked, but now that it is dead, I am not sure I am going to replace the battery in it, as it seems to be a known problem. They have changed the battery in the newer models, so what does that tell you? Great little cleaning robot when it has a battery that will hold a charge.
EDIT: I did follow the battery maintenance tips referenced in an earlier post and perhaps that is why it lasted several years for me.
When in doubt, use brute force.