LR44 battery
LR44 is the IEC designation for an alkaline 1.5 volt button cell, commonly used in small LED flashlights, digital thermometers, calculators, calipers, watches, clocks, toys, multimeters and laser pointers.
The battery nomenclature is defined by the International Electrotechnical Commission (IEC) in its 60086-3 standard (Primary batteries, part 3 Watch batteries). The letter L indicates the electrochemical system used: a zinc negative electrode, manganese dioxide depolarizer and positive electrode, and an alkaline electrolyte. R44 indicates a round cell 11.4±0.2 mm diameter and 5.2±0.2 mm height as defined by the IEC standard 60086.
Manufacturers have their own part numbers for IEC type LR44 batteries including:
LR44, LR44G, LR44GD, LR44H
LR1154, L1154, L1154C, L1154F, L1154G, L1154H
6135011748057 (NSN)
1166A (part number)
AG13, A613, AG14, AG-14, G13A, G13-A
157, 303, 357
A76, AG76, GDA76, GP76A, GPA7, GPA75, GPA76, GPS76A,
1128MP, 208-904, A-76, CA18, CA19, CR44, D76A, KA, KA76, MS76H, PX76A, PX675A, RPX675, RW82, SB-F9, V13GA