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393 / 309

Batteriesinaflash.com has an abundant amount of size 393/309 watch batteries available. These watch button cells (also are known as coin cells) fit many sizes. For example, a size 393 battery is the equivalent of a SR754W battery, which is also the same is a AG5 / SG5 Battery. If you happen to run into two batteries that are in the came category but have 2 difference sizes, it simply means that one battery is often a high drain battery while the other is a low drain battery. We carry top quality cells from Vinnic and Energizer with quantity pricing

What's the difference between a silver oxide battery vs an alkaline watch battery?
For several of our battery sizes, we carry both Silver Oxide and Alkaline chemistry batteries. So what's the difference between the two (outside of price)? Well, Silver Oxide batteries often have a higher energy density and have the ability to put out a high current for their size. These batteries typically last longer than their alkaline counterparts. These should never be used on a battery charger, ever

As for alkaline batteries, they are often used for most kinds of batteries, and watch batteries are no exception. They have a shorter shelf life compared to silver oxide batteries, but they still last pretty long regardless. They are cheaper to make (hence the smaller cost), the only problem with alkaline watch cells would be that they could potentially leak and could cause corrosion and damage your watch (or other devices that use these batteries.

Need help finding the right battery?
If you have a question about the best fit for your battery needs make sure to give us a call at (800) 515-BIAF. If you are unsure that you need a 393 and/or 309 battery and need to find the equivalents of that size, simply check out our Watch Size Battery Guide. We do our best to keep up to date with different brands and models.
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