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Home › Batteries › MR52
Button battery

MR52 is the same as LR52

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    LR52+ 1.5V

    MR52 is just another name for LR52. Same battery, different label, so you can buy either one.

    Search Amazon for MR52As 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.

    LR52A640PXE640EN640AEPX640APX640PX640A1126A
  4. 4

    Quick facts

    Size
    A little smaller than a dime
    Thickness
    As thick as 15 credit cards stacked
    Power
    1.5 volts
    Keeps in a drawer for
    About 5 years
    Rechargeable?
    No, use once
    Found in things like
    CamerasGamesInstrumentsVintage transistor radios
  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 LR52
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for MR52 (LR52) multi-packs
    See results on Amazon →
    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell LR52
    See results on Amazon →

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

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See it at real size

LR52 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

LR52Thickness 11.1US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read MR52:

MR52Legacy generic for this cell
LR52Physical cell: 15.8 × 11.1 mm, 1.5V alkaline

The same battery from each brand

BrandTheir name for it
Official nameLR52

Exact measurements

Width
15.8 mm (0.622 in)
Thickness
11.1 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
335 mAh
Weight
—
Made with
Alkaline
Works between
-10 … 60 °C
Official code
LR52 · ANSI 1126A

Questions people ask

Is MR52 the same as LR52?

Yes. They’re the same battery with different names. You might also see LR52, A640PX, E640, EN640A.

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.

LR52+ 1.5V
LR52Button battery
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1What it is2Safety3Other names4Facts5Buy it