Energizer 3v lithium coin cell battery energizer 637762 the energizer 637762 is a lithium button cell cr2032 and one of the most popular the lithium coin cell battery offers advantages over chemical systems its most significant advantages are the extended shelf life good low temperature operation high operating voltage and excellent leakage resistanceideal for calculators cameras electronic wristwatches and remote keyless entry energizer 637762 button cell cr2032 lithium 240 mah 3v x4