I needed to change the battery in an MRG-220, and ordered some CR1616 cells... only the idiot seller sent me CR1620 cells! Same diameter cell, but thicker (2mm vs 1.6mm).
If memory serves me, I remember there were some models where a G-Shock can accept a slightly different battery thickness. But in the case of a screwback, I worry about it possibly crushing the module if the margin is too slight.
Has anyone here successfully used a CR1620 in an older MRG digital watch, with no lasting problems?