Superior Maxell 389 SR1130W Micro Silver Oxide Watch Button Cell
Premium fresh Maxell Micro Silver Oxide SR1130W 1 Battery Genuine Japan Date Coded
For a great price on a box of 100 click here
Do not use (inherently low performing) "LR" alkaline batteries in place of silver oxide in any timepiece.
these and all shiny child-attracting small batteries out of the reach of
children; they are dangerous if swallowed.
Made in Japan
Genuine Hologram Anti-Counterfeit Package
Dimensions 11.6mm Diameter x 3mm Height
1.55 volts 79 mAh
This is a primary non rechargeable disposable battery
The 389 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.
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This is from the American Watchmakers-Clockmakers Institute 2008 Edition Handbook "Battery Number System". This Battery is cross-referenced as: AWCI S09, Energizer 390/389, Energizer 389/390, Energizer MD390, Energizer MD389, Citizen 280-15, Duracell D390/D389, Duracell D389/D390, Duracell 10L122, Mallory 390/389, Mallory 389/390, Mallory 390, Mallory 389, Mallory 10L122, Gold Peak GP89, Sylva-Cell GP89, Maxell SR1130SW, Maxell SR1130W, Maxell G10, Panasonic SP389, Panasonic SR1130SW, Panasonic SR1130W, Panasonic WL-10, Rayovac 389, Rayovac 390, Rayovac RW49, Renata 389, Renata 390, Renata 17, Sony SR1130SW, Sony SR1130W, Sony 389, Sony 390, Toshiba SR1130SW, Toshiba SR1130W, Varta V389, Varta V390, Varta 554
Casio Calculator Game Watch Module 134 series (circa 1981) use two batteries