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Home › Batteries › CR2012
Coin battery

CR2012 battery

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    CR2012+ 3V

    CR2012 is a coin battery, about the size of a nickel. It gives 3 volts.

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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.

  4. 4

    Quick facts

    Size
    About the size of a nickel
    Thickness
    As thick as 2 credit cards stacked
    Power
    3 volts
    Keeps in a drawer for
    About 10 years
    Rechargeable?
    No, use once
    Found in things like
    Slim watchesMedical devices
  5. 5

    Where to buy it

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

    Our pickThe exact match, 4-packEnergizer CR2012 3.0V Battery (4-Pack)
    Check Price on Amazon →
    Best value10-pack, handy to keep in a drawerCR2012 3.0V Battery Value Pack (10-Pack)
    Check Price on Amazon →
    Other brandDuracell, the same batteryDuracell CR2012 / CR2012 3.0V Battery
    Check Price on Amazon →

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

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See it at real size

CR2012 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

CR2012Thickness 1.2US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read CR2012:

CLithium manganese dioxide chemistry (3.0V)
RRound coin / button form factor
20≈ 20 mm diameter (exact 20.0 mm, 0.787 in)
121.2 mm thickness (exact 1.2 mm, 0.047 in)

The same battery from each brand

BrandTheir name for it
Official nameCR2012
Renata (Swiss)CR2012
PanasonicCR-2012

Exact measurements

Width
20.0 mm (0.787 in)
Thickness
1.2 mm
Voltage
3.0V (empty at 2.0V)
Energy stored
58 mAh
Weight
—
Made with
Lithium manganese dioxide
Works between
-30 … 60 °C
Official code
CR2012

Questions people ask

Is CR2012 the same as CR2012?

Yes. They’re the same battery with different names.

How long will a spare keep in a drawer?

About 10 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.

CR2012+ 3V
CR2012Coin battery
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1What it is2Safety3Other names4Facts5Buy it