Yes, when the end blades are worn down it usual means that the cell is failing or about to fail. Continuing to use the cell until the control unit gives up on it is fine. Eventually the control unit will say that it has had enough.
I've heard of a couple of people using generic cells without problems. However AutoPilot will stop supporting you if install a generic.
I've heard of a couple of people using generic cells without problems. However AutoPilot will stop supporting you if install a generic.