3LR12.

Equivalents:

1203, 1289, 3LR12, 3R12, 3R12G, 3R12R, 4.5 Volt, 4012, 4192, LR12, GP312, MN1203, Pocketable Battery,

Image
not to scale. Common
Name. Dimensions.
Length × Width. Chemical Composition. Nominal Voltage.

4.5 Volt. 62 mm × 22 mm
Contacts: 2 brass spring strips. Positive contact 19 × 6 mm.
Negative contact 30 × 6 mm.
Carbon Zinc (Standard)
Zinc Chloride (Heavy Duty).
4.5 volts.

Image not to scale.	Common Name.	Dimensions. Length × Width.	Chemical Composition.	Nominal Voltage.
	4.5 Volt.	62 mm × 22 mm Contacts: 2 brass spring strips. Positive contact 19 × 6 mm. Negative contact 30 × 6 mm.	Carbon Zinc (Standard) Zinc Chloride (Heavy Duty).	4.5 volts.

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