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S23PX (PX23S) Mercury free replacements for PX23 batteries. Silver Oxide battery equivalent to 4SR42 PX23S RPX23S 4NR43 EPX23 V23PX.
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S27PX (PX27S) Mercury free replacements for PX27 batteries. Silver Oxide battery equivalent to 4SR43 PX23S RPX23S 4NR43 EPX23 V23PX.
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