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Home › Batteries › PR70
Hearing aid battery

PR70 is the same as Size 10

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    10STICKER

    PR70 is just another name for Size 10. Same battery, different label, so you can buy either one.

    Get Size 10 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 →

    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 10A10ZA10V10
  4. 4

    Quick facts

    Size
    About as wide as a pencil eraser
    Thickness
    As thick as 5 credit cards stacked
    Power
    1.45 volts
    Keeps in a drawer for
    About 3 years
    Rechargeable?
    No, use once
    Found in things like
    Completely-in-canal hearing aids
  5. 5

    Where to buy it

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

    Our pickThe exact match, 4-packEnergizer PR70 (Size 10) 1.45V Battery (4-Pack)
    Check Price on Amazon →
    Best value10-pack, handy to keep in a drawerPR70 (Size 10) 1.45V Battery Value Pack (10-Pack)
    Check Price on Amazon →
    Other brandDuracell, the same batteryDuracell Size 10 / Size 10 1.45V Battery
    Check Price on Amazon →

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

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See it at real size

Size 10 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

Size 10Thickness 3.6US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read PR70:

PZinc-air chemistry (1.45V)
RRound button form factor
70Legacy IEC size number, not a dimension. Actual size 5.8 × 3.6 mm

The same battery from each brand

BrandTheir name for it
Official namePR70
Shop nameSize 10
Renata (Swiss)ZA10
VartaV10

Exact measurements

Width
5.8 mm (0.228 in)
Thickness
3.6 mm
Voltage
1.45V (empty at 1.1V)
Energy stored
95 mAh
Weight
0.3 g
Made with
Zinc-air
Works between
0 … 50 °C
Official code
PR70

Questions people ask

Is PR70 the same as Size 10?

Yes. They’re the same battery with different names. You might also see Size 10, A10, ZA10, V10.

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.

10STICKER
Size 10Hearing aid battery
Get Size 10 on AmazonAs an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

Something wrong or missing? Tell us

1What it is2Safety3Other names4Facts5Buy it