Glad it helped. I hate I losing the running settings cos I'll get rough idling for a few days. Unless no choice, I'll usually replace the battery with my car started.
Problem started when the battery empty suddenly. But after I put the key inside and turn it to ignition, the battery come back online and can start the car easily like normal. So I really don't know is it the battery kong or problem with battery cable...
You mentioned that the battery is dry. Is it a maintenance-free battery or not? Check the connections, are they loose? Is there a lot of white powder near the terminal? So have you changed to a new battery?