Please keep these and all shiny child-attracting small batteries out of the reach of children; they are dangerous if swallowed.
Made in Japan Genuine Maxell Hologram Anti-Counterfeit Packaging (other package is not genuine) Dimensions 4.8mm Diameter x 1.6mm Height 1.55 volts 8 mAh Mercury Free This is a primary non rechargeable disposable battery and is the world's smallest watch battery The 337 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 cannot give the correct time.
This is from the American Watchmakers-Clockmakers Institute 2008 Edition Handbook "Battery Number System". This Battery is cross-referenced as: AWCI S70, Energizer 337, UCAR 337, Eveready 337, Citizen 280-75, Maxell SR416SW, Panasonic SR416SW, National SR416SW, Rayovac 337, Seiko SR416SW, Toshiba SR416SW
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