A23BPZ-2 - 

Energizer® miniature manganese dioxide primary batteries are designed to provide an economical power source for device applications that do not require the flat voltage discharge curve characteristic of silver oxide batteries. Device applications in which miniature manganese dioxide batteries can be used as substitutes include calculators, some watches, and a variety of small toys. The substitution of miniature manganese dioxide batteries for silver oxide batteries should only be made where recommended by the device manufacturer. General characteristics of the miniature manganese dioxide systems include good low temperature characteristics, good resistance to shock, vibration, and acceleration, excellent service maintenance, and a sloping discharge curve.