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Home › Batteries › F
Regular battery

F battery

1What it is2Other names3Facts4Buy it
  1. 1

    What it is

    F

    F is a regular battery, much bigger than an AA. 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.

    LR25
  3. 3

    Quick facts

    Size
    Much bigger than an AA
    Power
    1.5 volts
    Keeps in a drawer for
    About 5 years
    Rechargeable?
    No, use once
    Found in things like
    Large flashlightsPortable radiosVintage transistor radios
  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 F
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    Amazon searchMulti-packs from any brandSearch Amazon for F multi-packs
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    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell F
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See it at real size

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

FUS quarterAA

What do the letters mean?

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

FCommon retail name for this cell
FPhysical cell: 33.0 × 91.0 mm, 1.5V alkaline

The same battery from each brand

BrandTheir name for it
Official nameLR25
Shop nameF

Exact measurements

Width
33.0 mm (1.299 in)
Length
91.0 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
26000 mAh
Weight
—
Made with
Alkaline
Works between
-10 … 60 °C
Official code
LR25

Questions people ask

Is F the same as LR25?

Yes. They’re the same battery with different names. You might also see LR25.

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.

F
FRegular battery
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1What it is2Other names3Facts4Buy it