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Home › Batteries › LR03
Everyday AAA battery

LR03 is the same as AAA

1What it is2Other names3Facts4Buy it
  1. 1

    What it is

    AAA

    LR03 is just another name for AAA. Same battery, different label, so you can buy either one.

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  2. 2

    Names you might see in the store

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

    AAAE92MN240024A
  3. 3

    Quick facts

    Size
    Shorter and thinner than an AA
    Power
    1.5 volts
    Keeps in a drawer for
    About 10 years
    Rechargeable?
    No, use once
    Found in things like
    RemotesToysClocks
  4. 4

    Where to buy it

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

    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer E92
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for LR03 (AAA) multi-packs
    See results on Amazon →
    Amazon searchDuracell MN2400 listings, the same batterySearch Amazon for Duracell MN2400
    See results on Amazon →

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See it at real size

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

AAAUS quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read LR03:

LAlkaline chemistry (1.5V)
RRound button form factor
03Legacy IEC size number, not a dimension. Actual size 10.5 × 44.5 mm

The same battery from each brand

BrandTheir name for it
Official nameLR03
Shop nameAAA
EnergizerE92
DuracellMN2400

Exact measurements

Width
10.5 mm (0.413 in)
Length
44.5 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
1200 mAh
Weight
11.5 g
Made with
Alkaline
Works between
-18 … 55 °C
Official code
LR03 · ANSI 24A

Questions people ask

Is LR03 the same as AAA?

Yes. They’re the same battery with different names. You might also see AAA, E92, MN2400, 24A.

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.

AAA
AAAEveryday AAA battery
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1What it is2Other names3Facts4Buy it