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Posted by hr(bob) hofmann@att.net on March 4, 2010, 6:42 pm
 

I have a small battery-operated calculator that I rarely use, but when
I do need it, I want to be sure the battery hasn't run down.  The
button cell can be a LR54, LR1130, D189, RW89, 389, SR54, or one of
several other codes,  Either silver or alkaline.  Does anyone know
which type of battery has the lowest internal self-discharge?