Q:

What battery size is equivalent to LR44?

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Quick Answer

LR44 is the International Electrotechnical Commission's designation for a 1.5 Volt button battery with a diameter of 11.4±0.2 millimeters and a height of 5.2±0.2 millimeters. Battery manufacturers typically have their own part numbers for batteries that comply with the LR44 standard.

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Full Answer

The "L" in the LR44 nomenclature indicates that the battery uses a manganese dioxide depolarizer and positive electrode, a zinc negative electrode and an alkaline electrolyte, while the "R44" designates the physical dimensions of the battery. A battery complying with the SR44 standard is the same size as an LR44 but uses a different electrochemical system with a different voltage profile that can lead to degraded performance in some devices if an SR44 is substituted for an LR44.

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