Thanks for the answers and some very nice and useful technical information.
Getting at the electronic innards at this time in my life seems too much trouble. There was a time in the past I built my own radio equipment, fixed TVs etc.
When friends and aquaintances found out I could do these things they always wanted free repairs. I learned to hate fixing electronics because of this. That was many years ago and I have forgotten much of it.
Currently it has an alkaline cell in it, I did not even think of the voltage issue when I asked a merchant for a replacement for this cell, I was just told that that particular cell replaced the earlier type, bought it and placed it in the camera.
I like the simple solution that Jojje mentions.