Do not use (inherently low performing) "LR" alkaline batteries in place of silver oxide in any timepiece: alkaline batteries have declining power output.
Made in Japan
Genuine Hologram Anti-Counterfeit Package (other packaging is not genuine)
The 394 SR936SW is completely interchangeable with the 3 8 0 SR 936 W
The 394 is a long life silver oxide chemistry with non-declining power output; alkaline batteries of the same 1.5 voltage start at 1.5 and at the half life are at .8 volts, silver oxide start at 1.55 volts and maintain the voltage until expiring. This is why silver oxide batteries are always used in watches, insulin pumps and sniper scopes or mission critical situations. Never use alkaline batteries for any device requiring a steady constant voltage. A watch with declining voltage may not prove dependable.
This is from the American Watchmakers-Clockmakers Institute 2008 Edition Handbook "Battery Number System". This Battery is cross-referenced as: AWCI S26/S33, Energizer 394/380, Energizer 380/394, Energizer MD394, Energizer MD380, Citizen 280-17, Duracell D394, Duracell 10L126, Duracell 10L12, Mallory D394, Mallory 10L126, Mallory 10L12, Gold Peak GP94, Sylva-cell GP94, Maxell SR936SW, Maxell SR936W, Panasonic SR936SW, National SR936SW, Rayovac 394, Rayovac RW33, Renata 394, Renata 380, Renata 27, Seiko SR936SW, Seiko SB-A4, Seiko SR45, Seiko SR/TR936W, Sony SR936SW, Sony 394, Sony 380, Toshiba SR936SW, Toshiba SR936W, Toshiba SR45, Varta V394, Varta V524
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