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Home › Batteries › R20
Regular battery

R20 battery

1What it is2Other names3Facts4Buy it
  1. 1

    What it is

    R20

    R20 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.

    13D13GR20P1250
  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 flashlightsClocksVintage 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 1250
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for R20 multi-packs
    See results on Amazon →
    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell R20
    See results on Amazon →

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See it at real size

R20 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

R20US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read R20:

RRound cylindrical form factor
20Carbon-zinc size number, not a dimension. Actual size 34.2 × 61.5 mm

The same battery from each brand

BrandTheir name for it
Official nameR20
Energizer1250

Exact measurements

Width
34.2 mm (1.346 in)
Length
61.5 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
8000 mAh
Weight
—
Made with
Carbon-zinc
Works between
-10 … 60 °C
Official code
R20 · ANSI 13D

Questions people ask

Is R20 the same as 13D?

Yes. They’re the same battery with different names. You might also see 13D, 13G, R20P, 1250.

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.

R20
R20Regular battery
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1What it is2Other names3Facts4Buy it