Maxell 391 SR1120W 100 Batteries
Please keep these and all shiny-silver child-attracting batteries stored safely away
children, if swallowed batteries are dangerous.
Dimensions: 11.6mm Diameter x 2.0mm Height
3 8 1 and 391 are completely interchangeable with identical functionality
Do not use (inherently low performing) alkaline batteries in place of silver oxide in any timepiece: alkaline batteries have declining power output.
Made in Japan
Genuine Maxell Hologram Anti-Counterfeit Packaging ( other package is not genuine)
This is a primary non rechargeable disposable battery
The 391 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
mission critical situations. Never use alkaline batteries for any device requiring a steady constant voltage. A watch with declining voltage may prove undependable.
This is from the American Watchmakers-Clockmakers Institute 2008 Edition Handbook "Battery Number System". This Battery is cross-referenced as: AWCI S11, Energizer (UCAR) 391, Citizen 280-30, Duracell D391/D381, Duracell D381/D391, Duracell D391, Duracell D381, Duracell 10L130, Mallory D391/D381, Mallory D381/D391, Mallory D391, Mallory D381, Mallory 10L130, Gold Peak GP91, Sylva-Cell GP91, Maxell SR1120W, Maxell G8, Panasonic SP391, Panasonic SR1120W, Panasonic WL-5, National SP391, National SR1120W, National WL-5, Rayovac 391, Rayovac RW40, Renata 391, Renata 23, Seiko SR1120W/TR1120W, Seiko SB-BS, Seiko SB-ES, Sony SR1120W, Sony 391, Toshiba SR1120W, Toshiba W1K, Varta V391, Varta 553.
Dealers have my permission to use this copyright research at no charge if you acknowledge "from Bob" as the source. You will have access to my ongoing updated material corrections and updates with new information.
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