KnowYourBatteries
KnowYourBatteries
Find by thingFind by batteryCan I swap?Measure itGuidesAbout usContact usSwallowed a battery?
Privacy policyTerms of useAffiliate disclosureCookie settings
EnglishEspañolFrançaisDeutsch

As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases. Battery facts come from the makers’ datasheets.

HomeFind by thingFind by batteryCan I swap?Measure it
Home › Batteries › L1121
Button battery

L1121 is the same as LR1120

1What it is2Safety3Other names4Tip5Facts6Buy it
  1. 1

    What it is

    LR1120+ 1.5V

    L1121 is just another name for LR1120. Same battery, different label, so you can buy either one.

    Search Amazon for L1121As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

    Something wrong or missing? Tell us

  2. 2

    Safety first

    Keep away from children and pets

    A swallowed coin or button battery can cause serious burns inside the body within 2 hours. If you think one was swallowed, get emergency help right away.

    Swallowed one? What to do now →
  3. 3

    Names you might see in the store

    All of these are the same battery. Any of them will work.

    LR1120AG8LR55LR1121191D191AV8GAGP191
  4. 4

    A tip before you buy

    SR1120SW is the same size and lasts longer

    It costs a little more but gives steadier power. Worth it for cameras, measuring tools and watches. For toys and laser pointers, LR1120 is fine.

    About SR1120SWCompare the two
  5. 5

    Quick facts

    Size
    About as wide as a shirt button
    Thickness
    As thick as 3 credit cards stacked
    Power
    1.5 volts
    Keeps in a drawer for
    About 5 years
    Rechargeable?
    No, use once
    Found in things like
    CalculatorsSmall toysWatches
  6. 6

    Where to buy it

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

    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer 191
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for L1121 (LR1120) multi-packs
    See results on Amazon →
    Amazon searchDuracell D191A listings, the same batterySearch Amazon for Duracell D191A
    See results on Amazon →

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

Show more details (optional)

See it at real size

LR1120 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

LR1120Thickness 2.1US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read L1121:

L1121Legacy generic for this cell
LR1120Physical cell: 11.6 × 2.1 mm, 1.5V alkaline

The same battery from each brand

BrandTheir name for it
Official nameLR1120
Energizer191
DuracellD191A
Murata (formerly Sony)LR1120
VartaV8GA
MaxellLR1120

Exact measurements

Width
11.6 mm (0.457 in)
Thickness
2.1 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
41 mAh
Weight
—
Made with
Alkaline
Works between
-10 … 60 °C
Official code
LR1120

Questions people ask

Is L1121 the same as LR1120?

Yes. They’re the same battery with different names. You might also see LR1120, AG8, LR55, LR1121.

Can I use SR1120SW instead?

Yes, and it’s even better. Same size, but it lasts longer and gives steadier power.

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.

Which way up does it go?

Usually with the side marked “+” facing you or facing up. Look at how the old one sits before you take it out.

LR1120+ 1.5V
LR1120Button battery
Search Amazon for L1121As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

Something wrong or missing? Tell us

1What it is2Safety3Other names4Tip5Facts6Buy it