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 › PR43
Hearing aid battery

PR43 battery

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    PR43STICKER

    PR43 is a hearing aid battery, about as wide as a shirt button. It gives 1.45 volts.

    Search Amazon for PR43As 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 →

    Leave the sticker on until you need it

    Once the sticker is off, the battery starts running down whether you use it or not.

  3. 3

    Names you might see in the store

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

    7001ZAC41E
  4. 4

    Quick facts

    Size
    About as wide as a shirt button
    Thickness
    As thick as 6 credit cards stacked
    Power
    1.45 volts
    Keeps in a drawer for
    About 3 years
    Rechargeable?
    No, use once
    Found in things like
    Behind-the-ear hearing aidsPower behind-the-ear hearing aidsHearing testers
  5. 5

    Where to buy it

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

    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer AC41E
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for PR43 multi-packs
    See results on Amazon →
    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell PR43
    See results on Amazon →

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

Show more details (optional)

See it at real size

PR43 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

PR43Thickness 4.2US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read PR43:

PZinc-air chemistry (1.45V)
RRound button form factor
43Legacy IEC size number, not a dimension. Actual size 11.6 × 4.2 mm

The same battery from each brand

BrandTheir name for it
Official namePR43
EnergizerAC41E

Exact measurements

Width
11.6 mm (0.457 in)
Thickness
4.2 mm
Voltage
1.45V (empty at 1.1V)
Energy stored
390 mAh
Weight
—
Made with
Zinc-air
Works between
0 … 50 °C
Official code
PR43 · ANSI 7001Z

Questions people ask

Is PR43 the same as 7001Z?

Yes. They’re the same battery with different names. You might also see 7001Z, AC41E.

How long will a spare keep in a drawer?

About 3 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.

PR43STICKER
PR43Hearing aid battery
Search Amazon for PR43As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

Something wrong or missing? Tell us

1What it is2Safety3Other names4Facts5Buy it