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Home › Batteries › MR44
Button battery

MR44 battery

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    MR44+ 1.4V

    MR44 is a button battery, about as wide as a shirt button. It gives 1.4 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.

    1152M313
  4. 4

    Quick facts

    Size
    About as wide as a shirt button
    Thickness
    As thick as 7 credit cards stacked
    Power
    1.4 volts
    Keeps in a drawer for
    About 5 years
    Rechargeable?
    No, use once
    Found in things like
    Medical devicesWatchesPrecision instruments
  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 313
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for MR44 multi-packs
    See results on Amazon →
    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell MR44
    See results on Amazon →

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

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See it at real size

MR44 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

MR44Thickness 5.4US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read MR44:

MR44IEC Standard for this cell
MR44Physical cell: 11.6 × 5.4 mm, 1.4V mercury

The same battery from each brand

BrandTheir name for it
Official nameMR44
Energizer313

Exact measurements

Width
11.6 mm (0.457 in)
Thickness
5.4 mm
Voltage
1.4V (empty at 0.9V)
Energy stored
245 mAh
Weight
—
Made with
Mercury oxide
Works between
-10 … 60 °C
Official code
MR44 · ANSI 1152M

Questions people ask

Is MR44 the same as 1152M?

Yes. They’re the same battery with different names. You might also see 1152M, 313.

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.

MR44+ 1.4V
MR44Button battery
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1What it is2Safety3Other names4Facts5Buy it