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Home › Batteries › PR63
Hearing aid battery

PR63 is the same as Size 5

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    5STICKER

    PR63 is just another name for Size 5. Same battery, different label, so you can buy either one.

    Search Amazon for PR63As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

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  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.

    Size 5AC5ZA57012ZD
  4. 4

    Quick facts

    Size
    About as wide as a pencil eraser
    Thickness
    As thick as 3 credit cards stacked
    Power
    1.45 volts
    Keeps in a drawer for
    About 3 years
    Rechargeable?
    No, use once
    Found in things like
    Small in-canal hearing aids
  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 Size 5
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for PR63 (Size 5) multi-packs
    See results on Amazon →
    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell Size 5
    See results on Amazon →

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

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See it at real size

Size 5 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

Size 5Thickness 2.5US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read PR63:

PZinc-air chemistry (1.45V)
RRound button form factor
63Legacy IEC size number, not a dimension. Actual size 5.8 × 2.5 mm

The same battery from each brand

BrandTheir name for it
Official namePR63
Shop nameSize 5
Renata (Swiss)ZA5

Exact measurements

Width
5.8 mm (0.228 in)
Thickness
2.5 mm
Voltage
1.45V (empty at 1.1V)
Energy stored
33 mAh
Weight
—
Made with
Zinc-air
Works between
0 … 50 °C
Official code
PR63 · ANSI 7012ZD

Questions people ask

Is PR63 the same as Size 5?

Yes. They’re the same battery with different names. You might also see Size 5, AC5, ZA5, 7012ZD.

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.

5STICKER
Size 5Hearing aid battery
Search Amazon for PR63As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

Something wrong or missing? Tell us

1What it is2Safety3Other names4Facts5Buy it