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Home › Batteries › 1/2 AA
Camera & alarm battery

1/2 AA battery

1What it is2Other names3Facts4Buy it
  1. 1

    What it is

    1/2 AA

    1/2 AA is a camera & alarm battery, short and chunky, about 2.5 cm long. It gives 3 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.

    CR14250
  3. 3

    Quick facts

    Size
    Short and chunky, about 2.5 cm long
    Power
    3 volts
    Keeps in a drawer for
    About 10 years
    Rechargeable?
    No, use once
    Found in things like
    Utility metersIndustrial memory backup
  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 1/2 AA
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    Amazon searchMulti-packs from any brandSearch Amazon for 1/2 AA multi-packs
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    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell 1/2 AA
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See it at real size

1/2 AA next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

1/2 AAUS quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read 1/2 AA:

1/2 AACommon retail name for this cell
1/2 AAPhysical cell: 14.5 × 25.0 mm, 3.0V lithium

The same battery from each brand

BrandTheir name for it
Official nameCR14250
Shop name1/2 AA

Exact measurements

Width
14.5 mm (0.571 in)
Length
25.0 mm
Voltage
3.0V (empty at 2.0V)
Energy stored
650 mAh
Weight
11 g
Made with
Lithium manganese dioxide
Works between
-40 … 60 °C
Official code
CR14250

Questions people ask

Is 1/2 AA the same as CR14250?

Yes. They’re the same battery with different names. You might also see CR14250.

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.

1/2 AA
1/2 AACamera & alarm battery
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1What it is2Other names3Facts4Buy it