It's a conspiracy, I tell ya! Same thing happened to me recently.....must be the end of life for a lot of lithium batteries out there
Mine went for 12 years though. Had only 0.4volts left when it quit, compared to 3.6v when new. I made up a new battery pack and hung it outside the 'black box' where I can get at it for the occassional probe with a multimeter henceforth
You'd have to wonder at the engineering for these things, when there is no circuit built to monitor the battery condition. Its about as dumb as building a car with no gas gauge.
Mine was a Meldas 50. There is more to it than just loading the parameters back in. The control needs to be reinitialized, then formatted, changed to English, then serial port settings put back in, the PLC reloaded and the parameters and tool offsets (if you saved them) reloaded. A call to Mits support is well worth while. The guys in the North American contact office are a sharp bunch.