I guess I'd better pull my finger out and replace the battery on mine, although, it hasn't actually been playing up, lately.
Also keen to see what has been done with my power supply, as it actually has a wall-wart, hard-wired to the rear of the case. (Pretty annoying for transport!) Maybe the original PSU died, so the previous owner found an alternative. Or maybe the early TI models had this setup...?
EG