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Home › Batteries › SR927SW
Watch battery

SR927SW battery

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    SR927SW+ 1.55V

    SR927SW is a watch battery, about as wide as a pea. It gives 1.55 volts.

    Get SR927SW on AmazonAs an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

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  2. 2

    Safety first

    Keep away from children and pets

    A swallowed coin or button battery can cause serious burns inside the body within 2 hours. If you think one was swallowed, get emergency help right away.

    Swallowed one? What to do now →
  3. 3

    Names you might see in the store

    All of these are the same battery. Any of them will work.

    395399AG7SR57V395
  4. 4

    Quick facts

    Size
    About as wide as a pea
    Thickness
    As thick as 4 credit cards stacked
    Power
    1.55 volts
    Keeps in a drawer for
    About 5 years
    Rechargeable?
    No, use once
    Found in things like
    Analog watches
  5. 5

    Where to buy it

    As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

    Our pickThe exact match, 4-packEnergizer SR927SW 1.55V Battery (4-Pack)
    Check Price on Amazon →
    Best value10-pack, handy to keep in a drawerSR927SW 1.55V Battery Value Pack (10-Pack)
    Check Price on Amazon →
    Other brandDuracell, the same batteryDuracell SR927SW / SR927SW 1.55V Battery
    Check Price on Amazon →

    Buttons open amazon.com 🇺🇸, picked from your country.

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See it at real size

SR927SW next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

SR927SWThickness 2.7US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read SR927SW:

SSilver oxide chemistry (1.55V)
RRound coin / button form factor
9≈ 9 mm diameter (exact 9.5 mm, 0.374 in)
272.7 mm thickness (exact 2.7 mm, 0.106 in)
SWLow-drain variant for analog watches

The same battery from each brand

BrandTheir name for it
Official nameSR927SW
Energizer395
Renata (Swiss)395
VartaV395

Exact measurements

Width
9.5 mm (0.374 in)
Thickness
2.7 mm
Voltage
1.55V (empty at 1.2V)
Energy stored
55 mAh
Weight
—
Made with
Silver oxide
Works between
-10 … 60 °C
Official code
SR927SW

Questions people ask

Is SR927SW the same as 395?

Yes. They’re the same battery with different names. You might also see 395, 399, AG7, SR57.

How long will a spare keep in a drawer?

About 5 years if it stays cool and dry.

Can I recharge it?

No. Never try to recharge it.

Which way up does it go?

Usually with the side marked “+” facing you or facing up. Look at how the old one sits before you take it out.

SR927SW+ 1.55V
SR927SWWatch battery
Get SR927SW on AmazonAs an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

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1What it is2Safety3Other names4Facts5Buy it