• 343 Watch Battery Equivalent
• Battery 395 399 Walmart
• 395 399 Battery Equivalent

5 Energizer 395/399 Multi-Drain 1.55V Silver Oxide Watch Batteries (SR927W, SR927SW) The Energizer 395-399TS is a multi-drain Silver-Oxide cell commonly used in watches, laser pointers, clocks, flashlights, and other such devices. Product Details. Know the difference between your credit cards and your an atm card. They may appear the same, but they way they are dealt with and also the rights they provide are not the same. When Buying Energizer 395 or 399 Button Silver Oxide SR927SW Cell Watch Battery Pack of 5 Batteries, you need to use your charge card.

Batteriesinaflash.com has an abundant amount of size 370/371 watch batteries available. These watch button cells (also are known as coin cells) fit many sizes. For example, a size 371 battery is the equivalent of a SR920SW battery, which is also the same is a AG6 / SG6 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, Maxell 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 370 and/or 371 battery and need to find the equivalent of that size, simply check out our Watch Size Battery Guide. Or you can use the battery finder below or on top of the page and select the specific size you are looking for. We keep up to date with different brands and models.

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• 10pack Exell EB-SR921 Silver Oxide 1.5V Watch Battery Replaces 371/370

• 20PK Maxell Silver Oxide Watch Battery SR920SW Low Drain Replaces 371

• 10PK Maxell Silver Oxide Watch Battery SR920SW Low Drain Replaces 371

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Button Cell / Coin Cell Batteries
Button and coin cell batteries are used to power small, portable electronics devices like the keyless entry remote for your car, laser pointers, pocket calculators, implantable cardiac defibrillators and even artificial cardiac pacemakers.

Most button cell and coin cell batteries have a low self-discharge, which means they hold their charge for a long time, giving them a long shelf-life. Because they’re so consistent and reliable, these types of batteries are great for use in products that require long, continuous service. They keep us on time when used in wristwatches, and in the case of pacemakers, we trust them with our lives, with a single battery providing five to ten years of artificial heartbeat.
Coin and button cells derive their names from their shape and size – thinner variants are called coin cells because they resemble coins, while thicker ones are called button cells because, you guessed it – they look like buttons. Their size ranges from 5 to 25 millimeters in diameter and 1 to 6 millimeters in height, and they’re single cell, usually primary cell batteries, which means they are single-use and disposable. Secondary cell batteries are rechargeable, though seldom seen when it comes to coin/button cells. Most commonly, secondary button and coin cells are used in computers and handheld gaming devices to store data when the device is powered off.
There are three main types of battery chemistries used in button/coin cells: alkaline, lithium and silver oxide. While they’re physically interchangeable, certain battery chemistries are preferable depending on usage specifications. For example, high drain applications like speakers and cameras will have different energy needs than a wireless remote control. The more you know about coin and button cell specs, the better you’ll be able to maximize battery life and efficacy. We’ll take a look at some of the major characteristics of alkaline, lithium and silver oxide batteries below.
Alkaline Button/Coin Cell Batteries (1.5 Volts)

When compared to lithium and silver oxide, alkaline batteries, which are denoted by the IEC prefix 'LR”, provide the least capacity and stable voltage. Alkaline voltage drops gradually with use, rather than lithium and silver oxide batteries, which provide steady, stable voltage before experiencing a sharp drop-off at the ends of their lives.
Since alkalines average around half the life of lithium and silver oxide, they are cheaper, meaning they are most likely to be included with any electronics you purchase, like kids’ toys or watches. However, if you are looking to replace the batteries in such a device, it’s going to be worth your while to invest in a lithium or silver oxide battery. These may be a little more expensive, but the return on investment you’ll get will easily pay for itself. And in the case of time telling devices, or metering equipment such as the light meter on a camera, stable voltage is always preferred in order to ensure accuracy.
Silver oxide batteries, which are denoted by the IEC prefix “SR”, are also a greener alternative to alkaline, as they are recyclable.
Note: For clarification, battery voltage and mAh refer to separate energy characteristics.

mAh (milli-ampere hour) measures battery capacity. In other words – how much current a battery will discharge over a one hour period. Higher mAh ratings correspond to how long a current can be drawn, rather than how fast it can be drawn. The mAh abbreviation is also written as Ah or Ampere-hour. (1 Ah = 1,000 mAh). Overall capacity is influenced by factors like temperature and speed of discharge. A 40 mAh battery can discharge 40 milliamps for one hour, 20 milliamps for two hours, and so on.
Voltage is a measurement of electrical potential, with all batteries being rated in volts DC (direct current). Voltage is determined by electrochemical reactions that occur in the battery, which vary according to battery type.

Silver Oxide (1.5 Volts) vs. Lithium (3 Volts) Button/Coin Cell Batteries
The choice between lithium and Silver Oxide batteries is a matter of voltage. Lithium batteries have a nominal 3 volt output, and silver oxide batteries operate at 1.5 volts. So, you’ll want to find out what type of voltage is required for the device you’re using. The easiest way to do so is by looking at the battery being replaced, which should have all the info you need. Battery requirements can also be found in product manuals, and often on the product itself.
All coin cell lithium batteries consist of lithium manganese dioxide chemistries (Li-MnO2), which account for 80% of the lithium battery market. Li-MnO2 chemistry is denoted by the IEC prefix “CR”, which we’ll discuss more below. Because it operates at 3 volts, one Li-MnO2 can replace two alkaline or silver-oxide cells, which function at 1.5 volts. It’s worth noting that voltage can be subject to fluctuate slightly depending on the quality of the battery maker. So, the more reputable the company, the more likely the battery will be of maximal quality.
Aside from superior capacity compared to alkaline batteries, lithium and silver oxide batteries have better leakage resistance, meaning they are less subject to corrosion, which can damage and destroy your device. They are also more lightweight and heat/cold resistant, functioning better in temperature extremes.
There are a couple other aspects of silver oxide batteries worth noting. Replacing a mercury button cell, which may be found in older photography equipment, with a silver oxide battery will affect the light meter settings, requiring them to be recalibrated. Mercury batteries, which are no longer produced, operated at 1.35 volts, compared to silver oxide's 1.5 volt discharge. Also, silver oxide watch batteries may have an 'SW' or 'W' suffix, which some makers use to denote whether the battery is a low drain (SW) or high drain (W) device. However, the IEC simply denotes that a watch battery is compliant with its standards with a 'W' suffix, which can be confusing.
You can make a reasonable determination of whether a watch or other device is high or low drain type by its features and functionality. If it's backlit, records the temperature and has a calculator, it's probably high drain. If you're not sure, the best way to be certain is to contact the manufacturer for the battery's specifications. When in doubt, go with high drain – they will last longer in both types of devices.
Battery Naming Standards
The way batteries are named can make it confusing to find what you need. Thankfully, once you know the format, the process becomes much easier.
Every battery has a standardized name. There are multiple sets of battery naming standards, but currently the most prevalent is IEC (International Electrotechnical Commission), though others such as ANSI (American National Standards Institute) may be seen.
In an ideal world, button/coin cell batteries will have their IEC classification prominently displayed.
Take a look at the battery on the right. As you can see, it’s a CR2032, which tells you that it is a single cell, round lithium battery with a diameter of 20 mm and a height of 3.2 mm. How did we get all that from a few letters and numbers? Let’s break it down.
The first letter, C, denotes the battery chemistry, in this case Lithium. The next letter, R, tells us the battery shape: round. Battery shapes can also be Flat (F), Square (S), and simply Not Round (P).
Finally, the three or four digit reference numbers on the batteries indicate their exact or approximate size as needed. In this case, 2032 tells us that the battery is 20mm in diameter and 3.2mm thick.
Other modifiers can be used to denote whether a battery consists of multiple cells (a numerical prefix corresponding to cell amount), whether it’s a high or low drain device and more. In silver oxide batteries, the SW suffix corresponds to use in a low drain device, while W refers to use in high drain devices.[3]
Refer to the chart below for a full list of Button/Coin cell battery types and nomenclature.

Lithium Coin Cell Battery Conversion Chart

343 Watch Battery Equivalent

Battery 395 399 Walmart

395 399 Battery Equivalent

1. https://en.wikipedia.org/wiki/List_of_battery_sizes#Button_cells_-_coin.2C_watch. Retrieved 20 October 2016.
2. http://www.consumerreports.org/cro/batteries/buying-guide.htm. Retrieved 17 October 2016.
3. https://en.wikipedia.org/wiki/Battery_nomenclature#History_of_the_IEC_standard. Retrieved 19 October 2016.
   
4. http://www.energizer.com/about-batteries/battery-care. Retrieved 17 October 2016.