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 › LR1142
Button battery

LR1142 is the same as LR43

1What it is2Safety3Other names4Tip5Facts6Buy it
  1. 1

    What it is

    LR43+ 1.5V

    LR1142 is just another name for LR43. Same battery, different label, so you can buy either one.

    Get LR43 on AmazonAs 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.

    LR43AG12186V12GA
  4. 4

    A tip before you buy

    SR43 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, LR43 is fine.

    About SR43Compare the two
  5. 5

    Quick facts

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

    Where to buy it

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

    Our pickThe exact match, 4-packEnergizer LR1142 (LR43) 1.5V Battery (4-Pack)
    Check Price on Amazon →
    Best value10-pack, handy to keep in a drawerLR1142 (LR43) 1.5V Battery Value Pack (10-Pack)
    Check Price on Amazon →
    Other brandDuracell, the same batteryDuracell LR43 / LR43 1.5V Battery
    Check Price on Amazon →

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

Show more details (optional)

See it at real size

LR43 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

LR43Thickness 4.2US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read LR1142:

LAlkaline chemistry (1.5V)
RRound coin / button form factor
11≈ 11 mm diameter (exact 11.6 mm, 0.457 in)
424.2 mm thickness (exact 4.2 mm, 0.165 in)

The same battery from each brand

BrandTheir name for it
Official nameLR43
Energizer186
VartaV12GA
MaxellLR43

Exact measurements

Width
11.6 mm (0.457 in)
Thickness
4.2 mm
Voltage
1.5V (empty at 0.9V)
Energy stored
100 mAh
Weight
1.6 g
Made with
Alkaline
Works between
-10 … 60 °C
Official code
LR43

Questions people ask

Is LR1142 the same as LR43?

Yes. They’re the same battery with different names. You might also see LR43, AG12, 186, V12GA.

Can I use SR43 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.

LR43+ 1.5V
LR43Button battery
Get LR43 on AmazonAs an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

Something wrong or missing? Tell us

1What it is2Safety3Other names4Tip5Facts6Buy it