Sharp PC-1211, battery question

[blackjetrock]

You can use LR44 batteries in the version of the PC1211 that takes 3 1.5V batteries. This seems to be a version that was sold by Sharp later on. They aren't very common but I do have one.
Alternatively you can maybe rewire the power circuit with a diode to drop the extra voltage. I did this on one of my PC1211s and it seems fine, although I am a bit dubious about the centre tap that the circuit uses. I need to revisit this mod and see if I can improve it.

I wrote it up here:
https://trochilidae.blogspot.com/2016/11...c1211.html

Andrew