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Home › Batteries › AAAA
Extra-thin AAAA battery

AAAA battery

1What it is2Other names3Facts4Buy it
  1. 1

    What it is

    AAAA

    AAAA is a extra-thin aaaa battery, a bit shorter than an AA and as thin as a pencil. It gives 1.5 volts.

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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.

    LR61E96MN250025A
  3. 3

    Quick facts

    Size
    A bit shorter than an AA and as thin as a pencil
    Power
    1.5 volts
    Keeps in a drawer for
    About 7 years
    Rechargeable?
    No, use once
    Found in things like
    Stylus pens (Surface Pen)LED penlightsGlucose meters
  4. 4

    Where to buy it

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

    Our pickThe exact match, 4-packEnergizer AAAA 1.5V Battery (4-Pack)
    Check Price on Amazon →
    Best value10-pack, handy to keep in a drawerAAAA 1.5V Battery Value Pack (10-Pack)
    Check Price on Amazon →
    Other brandDuracell MN2500, the same batteryDuracell MN2500 / AAAA 1.5V Battery
    Check Price on Amazon →

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

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See it at real size

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

AAAAUS quarterAA

What do the letters mean?

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

AAAACommon retail name for this cell
AAAAPhysical cell: 8.3 × 42.5 mm, 1.5V alkaline

The same battery from each brand

BrandTheir name for it
Official nameLR61
Shop nameAAAA
EnergizerE96
DuracellMN2500

Exact measurements

Width
8.3 mm (0.327 in)
Length
42.5 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
625 mAh
Weight
6.5 g
Made with
Alkaline
Works between
-18 … 55 °C
Official code
LR61

Questions people ask

Is AAAA the same as LR61?

Yes. They’re the same battery with different names. You might also see LR61, E96, MN2500, 25A.

How long will a spare keep in a drawer?

About 7 years if it stays cool and dry.

Can I recharge it?

No. Never try to recharge it.

AAAA
AAAAExtra-thin AAAA battery
Get AAAA on AmazonAs an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

Something wrong or missing? Tell us

1What it is2Other names3Facts4Buy it