i've had ag13 (and many other button batteries) corrode on me, in or out of date.
If the doll still sings, is that a sure sign that her batteries have not corroded? Or do I open her box, negating being MIB, to be sure the doll is protected from corrosion?
so follow CM's advice: remove all batteries, or check for leaks often (if i leave batts in something, i check monthly)
I can test her once a month, which I did last night; that is the most I can do without opening her box.
Jeanette Isabelle