Thanks for the response.
So too low a voltage in one of the cells is permanent damage? There is no way to reverse it and make the battery useable again (without risking fire)?
Total novice with electronics, and having problems with a lithium polymer battery (it is a robotics project built by someone else but I need to get it functioning). When charging the battery, the charger is telling us that there is too great a voltage difference across the cells.
What could be...