3LR12. Battery Details Page.

These can be difficult to find, however Westfalia, here in the UK, sell an adaptor case (Item No. 430033) that takes 3 × AA batteries, converting them to the size, shape and contacts of the 3LR12. Ideal for rechargeables too.

Equivalents:

1041, 1203, 1289, 3LR12, 3R12, 3R12G, 3R12R, 4.5 Volt, 3336, 4012, 4192, LR12, GP312, MN1203, Pocketable Battery,

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

4.5 Volt. 67 mm × 22 mm × 62 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 × Height.	Chemical Composition.	Nominal Voltage.
	4.5 Volt.	67 mm × 22 mm × 62 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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