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Home › Batteries › CR2330
Coin battery

CR2330 battery

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    CR2330+ 3V

    CR2330 is a coin battery, about the size of a quarter. 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 quarter
    Thickness
    As thick as 4 credit cards stacked
    Power
    3 volts
    Keeps in a drawer for
    About 10 years
    Rechargeable?
    No, use once
    Found in things like
    Key fobsSmart-home sensors
  5. 5

    Where to buy it

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

    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer CR2330
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for CR2330 multi-packs
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    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell CR2330
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See it at real size

CR2330 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

CR2330Thickness 3.0US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read CR2330:

CLithium manganese dioxide chemistry (3.0V)
RRound coin / button form factor
23≈ 23 mm diameter (exact 23.0 mm, 0.906 in)
303.0 mm thickness (exact 3.0 mm, 0.118 in)

The same battery from each brand

BrandTheir name for it
Official nameCR2330
PanasonicCR-2330

Exact measurements

Width
23.0 mm (0.906 in)
Thickness
3.0 mm
Voltage
3.0V (empty at 2.0V)
Energy stored
265 mAh
Weight
3.7 g
Made with
Lithium manganese dioxide
Works between
-30 … 60 °C
Official code
CR2330

Questions people ask

Is CR2330 the same as CR2330?

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.

CR2330+ 3V
CR2330Coin battery
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1What it is2Safety3Other names4Facts5Buy it