Hi, before you go and buy a replacement battery, you might want to try to reset the Roomba first. The Roomba may be set in a state where it will only charge to a certain amount. Just follow the instructions indicated here to reset your Roomba. http://www.eesolutions.ca/roomba_battery...

Hi, I suggest you try to reset your Roomba and if that doesn't work you may need a new battery pack. For full instructions you can visit http://www.eesolutions.ca/roomba_battery...

I had a similar problem, but had to replace some sensors on the board. Looked all over for a fix. Found an affordable one that worked well. took an hour or so. http://eesolutions.ca/roomba_repair_kit.... I'd recommend it. Took forever to find the site though.