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Home › Batteries › R1
Regular battery

R1 battery

1What it is2Other names3Facts4Buy it
  1. 1

    What it is

    R1

    R1 is a regular battery, short and skinny, about 3 cm long. 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.

    910D
  3. 3

    Quick facts

    Size
    Short and skinny, about 3 cm long
    Power
    1.5 volts
    Keeps in a drawer for
    About 5 years
    Rechargeable?
    No, use once
    Found in things like
    Small remotesCalculatorsClocks
  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 R1
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for R1 multi-packs
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    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell R1
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See it at real size

R1 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

R1US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read R1:

RRound cylindrical form factor
1Carbon-zinc size number, not a dimension. Actual size 12.0 × 30.2 mm

The same battery from each brand

BrandTheir name for it
Official nameR1

Exact measurements

Width
12.0 mm (0.472 in)
Length
30.2 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
400 mAh
Weight
—
Made with
Carbon-zinc
Works between
-10 … 60 °C
Official code
R1 · ANSI 910D

Questions people ask

Is R1 the same as 910D?

Yes. They’re the same battery with different names. You might also see 910D.

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.

R1
R1Regular battery
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1What it is2Other names3Facts4Buy it