Dimensions: 7.9mm Diameter x 5.4mm Height
Energizer Micro Silver Oxide SR754W/SR754SW Box of 100. 20 Strips of 5 Batteries SR754W 393 are completely interchangeable with SR754SW 309
Do not use (inherently low performing) alkaline batteries in place of silver oxide in any timepiece.
Made in U.S.A or Japan
1.55 volts 75 mAh
This is a primary non rechargeable disposable battery
The 393 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.
Fits and Replaces: This is from the American Watchmakers-Clockmakers Institute 2008 Edition Handbook "Battery Number System". This Battery is cross-referenced as: AWCI S15, Energizer 309, Duracell D309/D393, Duracell D393/D309, Duracell D309, Duracell D393, Duracell 10L23, Mallory 309/393, Mallory 393/309, Mallory 309, Mallory 393, Mallory 10L23, Gold Peak GP93, Sylva-Cell GP93, Maxell SR754SW, Maxell SR754W, Maxell G5, Panasonic SP393, Panasonic SR754SW, Panasonic SR754W, Panasonic SR48W, Panasonic WL-6, Rayovac 309, Rayovac 393, Rayovac RW48, Rayovac RW28, Renata 309, Renata 393, Renata 15, Sony 393 Toshiba SR48W, Toshiba SR754W, Varta V309, Varta V393, Varta 526