4NR42.

Equivalents:

4LR42, 4NR42, 4SR42, EPX23, PX23, PX23A, PX23S, RPX23A, RPX23S, U23PX, V23PX,

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

PX23. 20.5 mm × 15.24 mm
Contacts:
Raised "pip" Positive
Raised "pip" opposite end Negitive.
Alkaline,
Silver Oxide (Ag₂O).
6.0 volts.
(5.6 volts
for the discontinued Mercury types)

Image not to scale.	Common Name.	Dimensions. Length × Diameter.	Chemical Composition.	Nominal Voltage.
	PX23.	20.5 mm × 15.24 mm Contacts: Raised "pip" Positive Raised "pip" opposite end Negitive.	Alkaline, Silver Oxide (Ag₂O).	6.0 volts. (5.6 volts for the discontinued Mercury types)

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